ARM: restart: pxa: use new restart hook

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

Acked-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/mach-pxa/balloon3.c b/arch/arm/mach-pxa/balloon3.c
index 4b81f59..82514f5 100644
--- a/arch/arm/mach-pxa/balloon3.c
+++ b/arch/arm/mach-pxa/balloon3.c
@@ -829,4 +829,5 @@
 	.timer		= &pxa_timer,
 	.init_machine	= balloon3_init,
 	.atag_offset	= 0x100,
+	.restart	= pxa_restart,
 MACHINE_END