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/imx53-dt.c b/arch/arm/mach-imx/imx53-dt.c
index eb04b62..481c3e9 100644
--- a/arch/arm/mach-imx/imx53-dt.c
+++ b/arch/arm/mach-imx/imx53-dt.c
@@ -147,6 +147,7 @@
 	.handle_irq	= imx53_handle_irq,
 	.timer		= &imx53_timer,
 	.init_machine	= imx53_dt_init,
+	.init_late	= imx53_init_late,
 	.dt_compat	= imx53_dt_board_compat,
 	.restart	= mxc_restart,
 MACHINE_END