ANDROID: usb: gadget: cleanup: fix unused variable and function warnings

Remove unused variables and functions to fix following
build warnings:

  CC      drivers/usb/gadget/configfs.o
drivers/usb/gadget/configfs.c: In function ‘gadgets_make’:
drivers/usb/gadget/configfs.c:1710:6: warning: unused variable ‘err’ [-Wunused-variable]
  int err;
      ^
drivers/usb/gadget/configfs.c:1709:27: warning: unused variable ‘attr’ [-Wunused-variable]
  struct device_attribute *attr;
                           ^
drivers/usb/gadget/configfs.c:1708:28: warning: unused variable ‘attrs’ [-Wunused-variable]
  struct device_attribute **attrs;
                            ^
drivers/usb/gadget/configfs.c: In function ‘gadgets_drop’:
drivers/usb/gadget/configfs.c:1774:27: warning: unused variable ‘attr’ [-Wunused-variable]
  struct device_attribute *attr;
                           ^
drivers/usb/gadget/configfs.c:1773:28: warning: unused variable ‘attrs’ [-Wunused-variable]
  struct device_attribute **attrs;
                            ^
<snip>...
  CC      drivers/usb/gadget/function/f_mtp.o
drivers/usb/gadget/function/f_mtp.c:1219:12: warning: ‘mtp_bind_config’ defined but not used [-Wunused-function]
 static int mtp_bind_config(struct usb_configuration *c, bool ptp_config)
            ^
drivers/usb/gadget/function/f_mtp.c:1300:12: warning: ‘mtp_setup’ defined but not used [-Wunused-function]
 static int mtp_setup(void)
            ^
<snip>...
  CC      drivers/usb/gadget/function/f_accessory.o
drivers/usb/gadget/function/f_accessory.c:969:1: warning: ‘acc_function_bind’ defined but not used [-Wunused-function]
 acc_function_bind(struct usb_configuration *c, struct usb_function *f) {
 ^
drivers/usb/gadget/function/f_accessory.c:1172:12: warning: ‘acc_bind_config’ defined but not used [-Wunused-function]
 static int acc_bind_config(struct usb_configuration *c)
            ^

Signed-off-by: Amit Pundir <amit.pundir@linaro.org>

drivers/usb/gadget/configfs.c

@@ -1651,9 +1651,6 @@ static struct config_group *gadgets_make(
 		const char *name)
 {
 	struct gadget_info *gi;
-	struct device_attribute **attrs;
-	struct device_attribute *attr;
-	int err;
 
 	gi = kzalloc(sizeof(*gi), GFP_KERNEL);
 	if (!gi)
@@ -1712,9 +1709,6 @@ err:
 
 static void gadgets_drop(struct config_group *group, struct config_item *item)
 {
-	struct device_attribute **attrs;
-	struct device_attribute *attr;
-
 	config_item_put(item);
 	android_device_destroy();
 }

drivers/usb/gadget/function/f_accessory.c

@@ -943,11 +943,6 @@ __acc_function_bind(struct usb_configuration *c,
 	return 0;
 }
 
-static int
-acc_function_bind(struct usb_configuration *c, struct usb_function *f) {
-	return __acc_function_bind(c, f, false);
-}
-
 static int
 acc_function_bind_configfs(struct usb_configuration *c,
 			struct usb_function *f) {
@@ -1147,35 +1142,6 @@ static void acc_function_disable(struct usb_function *f)
 	VDBG(cdev, "%s disabled\n", dev->function.name);
 }
 
-static int acc_bind_config(struct usb_configuration *c)
-{
-	struct acc_dev *dev = _acc_dev;
-	int ret;
-
-	printk(KERN_INFO "acc_bind_config\n");
-
-	/* allocate a string ID for our interface */
-	if (acc_string_defs[INTERFACE_STRING_INDEX].id == 0) {
-		ret = usb_string_id(c->cdev);
-		if (ret < 0)
-			return ret;
-		acc_string_defs[INTERFACE_STRING_INDEX].id = ret;
-		acc_interface_desc.iInterface = ret;
-	}
-
-	dev->cdev = c->cdev;
-	dev->function.name = "accessory";
-	dev->function.strings = acc_strings,
-	dev->function.fs_descriptors = fs_acc_descs;
-	dev->function.hs_descriptors = hs_acc_descs;
-	dev->function.bind = acc_function_bind;
-	dev->function.unbind = acc_function_unbind;
-	dev->function.set_alt = acc_function_set_alt;
-	dev->function.disable = acc_function_disable;
-
-	return usb_add_function(c, &dev->function);
-}
-
 static int acc_setup(void)
 {
 	struct acc_dev *dev;

drivers/usb/gadget/function/f_mtp.c

@@ -1216,40 +1216,6 @@ static void mtp_function_disable(struct usb_function *f)
 	VDBG(cdev, "%s disabled\n", dev->function.name);
 }
 
-static int mtp_bind_config(struct usb_configuration *c, bool ptp_config)
-{
-	struct mtp_dev *dev = _mtp_dev;
-	int ret = 0;
-
-	printk(KERN_INFO "mtp_bind_config\n");
-
-	/* allocate a string ID for our interface */
-	if (mtp_string_defs[INTERFACE_STRING_INDEX].id == 0) {
-		ret = usb_string_id(c->cdev);
-		if (ret < 0)
-			return ret;
-		mtp_string_defs[INTERFACE_STRING_INDEX].id = ret;
-		mtp_interface_desc.iInterface = ret;
-	}
-
-	dev->cdev = c->cdev;
-	dev->function.name = DRIVER_NAME;
-	dev->function.strings = mtp_strings;
-	if (ptp_config) {
-		dev->function.fs_descriptors = fs_ptp_descs;
-		dev->function.hs_descriptors = hs_ptp_descs;
-	} else {
-		dev->function.fs_descriptors = fs_mtp_descs;
-		dev->function.hs_descriptors = hs_mtp_descs;
-	}
-	dev->function.bind = mtp_function_bind;
-	dev->function.unbind = mtp_function_unbind;
-	dev->function.set_alt = mtp_function_set_alt;
-	dev->function.disable = mtp_function_disable;
-
-	return usb_add_function(c, &dev->function);
-}
-
 static int __mtp_setup(struct mtp_instance *fi_mtp)
 {
 	struct mtp_dev *dev;
@@ -1297,11 +1263,6 @@ err1:
 	return ret;
 }
 
-static int mtp_setup(void)
-{
-	return __mtp_setup(NULL);
-}
-
 static int mtp_setup_configfs(struct mtp_instance *fi_mtp)
 {
 	return __mtp_setup(fi_mtp);