ARM: imx: Enable imx53 low power idle

Add various functionality needed to enable a imx53 low power idle
state.  This includes adding the imx53 gpc_dvfs clock and making a
common imx5_late_init function and initializing all imx53
 MACHINE_STATE late_init calls to imx5_late_init.

Signed-off-by: Robert Lee <rob.lee@linaro.org>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
diff --git a/arch/arm/mach-imx/pm-imx5.c b/arch/arm/mach-imx/pm-imx5.c
index baf9321..b3dcd8e 100644
--- a/arch/arm/mach-imx/pm-imx5.c
+++ b/arch/arm/mach-imx/pm-imx5.c
@@ -166,3 +166,8 @@
 	if (!ret)
 		suspend_set_ops(&mx5_suspend_ops);
 }
+
+void __init imx53_pm_init(void)
+{
+	imx5_pm_common_init();
+}