ARM: shmobile: Use __init for APMU suspend init function

The function shmobile_smp_apmu_suspend_init() should
be put into the init section to not trigger section
mismatch warnings.
Signed-off-by: Magnus Damm <damm+renesas@opensource.se>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

arch/arm/mach-shmobile/platsmp-apmu.c

@@ -240,7 +240,7 @@ static int shmobile_smp_apmu_enter_suspend(suspend_state_t state)
 	return 0;
 }
 
-void shmobile_smp_apmu_suspend_init(void)
+void __init shmobile_smp_apmu_suspend_init(void)
 {
 	shmobile_suspend_ops.enter = shmobile_smp_apmu_enter_suspend;
 }