ARM: shmobile: r8a7790: Support Core-Standby for Suspend to RAM

Add r8a7790 Core-Standby state for Suspend to RAM support.
Signed-off-by: NKeita Kobayashi <keita.kobayashi.ym@renesas.com>
Acked-by: NMagnus Damm <damm+renesas@opensource.se>
Signed-off-by: NSimon Horman <horms+renesas@verge.net.au>

arch/arm/mach-shmobile/smp-r8a7790.c

@@ -69,6 +69,7 @@ static void __init r8a7790_smp_prepare_cpus(unsigned int max_cpus)
 
 	/* turn on power to SCU */
 	r8a7790_pm_init();
+	shmobile_smp_apmu_suspend_init();
 	rcar_sysc_power_up(&r8a7790_ca15_scu);
 	rcar_sysc_power_up(&r8a7790_ca7_scu);
 }