core_ctrl: Move core control into kernel

Move core control from out-of-tree module into the kernel proper.

Core control monitors load on CPUs and controls how many CPUs are
available for the system to use at any point in time. This can help save
power. Core control can be configured through sysfs interface.

Signed-off-by: Olav Haugan <ohaugan@codeaurora.org>
[markivx: Fixed trivial makefile conflict]
Signed-off-by: Vikram Mulukutla <markivx@codeaurora.org>

Change-Id: I491d584da0d5068fb11c8df556d9a1683bf418c7
Signed-off-by: Satya Durga Srinivasu Prabhala <satyap@codeaurora.org>

init/Kconfig

@@ -890,6 +890,16 @@ config SOCK_CGROUP_DATA
 
 endif # CGROUPS
 
+config SCHED_CORE_CTL
+	bool "QTI Core Control"
+	depends on SMP
+	help
+	  This options enables the core control functionality in
+	  the scheduler. Core control automatically offline and
+	  online cores based on cpu load and utilization.
+
+	  If unsure, say N here.
+
 config CHECKPOINT_RESTORE
 	bool "Checkpoint/restore support" if EXPERT
 	select PROC_CHILDREN

kernel/sched/Makefile

@@ -30,3 +30,4 @@ obj-$(CONFIG_CGROUP_CPUACCT) += cpuacct.o
 obj-$(CONFIG_CPU_FREQ) += cpufreq.o
 obj-$(CONFIG_CPU_FREQ_GOV_SCHEDUTIL) += cpufreq_schedutil.o
 obj-$(CONFIG_MEMBARRIER) += membarrier.o
+obj-$(CONFIG_SCHED_CORE_CTL) += core_ctl.o