ARM: restart: mxc: use new restart hook

Hook these platforms restart code into the new restart hook rather
than using arch_reset().

Acked-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/mach-mx5/imx51-dt.c b/arch/arm/mach-mx5/imx51-dt.c
index 596edd9..e6bad17 100644
--- a/arch/arm/mach-mx5/imx51-dt.c
+++ b/arch/arm/mach-mx5/imx51-dt.c
@@ -115,4 +115,5 @@
 	.timer		= &imx51_timer,
 	.init_machine	= imx51_dt_init,
 	.dt_compat	= imx51_dt_board_compat,
+	.restart	= mxc_restart,
 MACHINE_END