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-imx/mach-mx21ads.c b/arch/arm/mach-imx/mach-mx21ads.c
index 25f8402..8d9f955 100644
--- a/arch/arm/mach-imx/mach-mx21ads.c
+++ b/arch/arm/mach-imx/mach-mx21ads.c
@@ -312,4 +312,5 @@
 	.handle_irq = imx21_handle_irq,
 	.timer = &mx21ads_timer,
 	.init_machine = mx21ads_board_init,
+	.restart	= mxc_restart,
 MACHINE_END