ARM: mmp: add PM support for mmp2

MMP2 can enter system sleep level during suspend.
It can be waken up by PMIC interrupt, RTC/ALARM.

Signed-off-by: Chao Xie <chao.xie@marvell.com>
Signed-off-by: Haojian Zhuang <haojian.zhuang@gmail.com>

arch/arm/mach-mmp/irq.c

@@ -23,6 +23,10 @@
 
 #include <mach/irqs.h>
 
+#ifdef CONFIG_CPU_MMP2
+#include <mach/pm-mmp2.h>
+#endif
+
 #include "common.h"
 
 #define MAX_ICU_NR		16
@@ -305,6 +309,9 @@ void __init mmp2_init_icu(void)
 		set_irq_flags(irq, IRQF_VALID);
 	}
 	irq_set_default_host(icu_data[0].domain);
+#ifdef CONFIG_CPU_MMP2
+	icu_irq_chip.irq_set_wake = mmp2_set_wake;
+#endif
 }
 
 #ifdef CONFIG_OF