ARM: shmobile: r8a7791: Support Core-Standby for Suspend to RAM

Add r8a7791 Core-Standby state for Suspend to RAM support.
Signed-off-by: NKeita Kobayashi <keita.kobayashi.ym@renesas.com>
Signed-off-by: NSimon Horman <horms+renesas@verge.net.au>

arch/arm/mach-shmobile/smp-r8a7791.c

@@ -52,6 +52,7 @@ static void __init r8a7791_smp_prepare_cpus(unsigned int max_cpus)
 	iounmap(p);
 
 	r8a7791_pm_init();
+	shmobile_smp_apmu_suspend_init();
 }
 
 static int r8a7791_smp_boot_secondary(unsigned int cpu,