[ARM] 2949/1: Hynix h720x Run mode

Patch from Sascha Hauer

After coming out of idle mode the h720x goes into slow mode. Switch
it back to run mode.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

include/asm-arm/arch-h720x/system.h

@@ -17,9 +17,11 @@
 static void arch_idle(void)
 {
 	CPU_REG (PMU_BASE, PMU_MODE) = PMU_MODE_IDLE;
-	__asm__ __volatile__(
-	"mov	r0, r0\n\t"
-	"mov	r0, r0");
+	nop();
+	nop();
+	CPU_REG (PMU_BASE, PMU_MODE) = PMU_MODE_RUN;
+	nop();
+	nop();
 }