[POWERPC] Fix warning on UP

arch/powerpc/platforms/pseries/pseries.h:24: warning: return type defaults to 'int'
arch/powerpc/platforms/pseries/pseries.h:25: warning: return type defaults to 'int'
arch/powerpc/platforms/pseries/pseries.h:24: warning: control reaches end of non-void function
arch/powerpc/platforms/pseries/pseries.h:25: warning: control reaches end of non-void function

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>

arch/powerpc/platforms/pseries/pseries.h

@@ -21,8 +21,8 @@ extern int pSeries_machine_check_exception(struct pt_regs *regs);
 extern void smp_init_pseries_mpic(void);
 extern void smp_init_pseries_xics(void);
 #else
-static inline smp_init_pseries_mpic(void) { };
-static inline smp_init_pseries_xics(void) { };
+static inline void smp_init_pseries_mpic(void) { };
+static inline void smp_init_pseries_xics(void) { };
 #endif
 
 #ifdef CONFIG_KEXEC