ARM: restart: orion5x: use new restart hook

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

In addition, convert calls to arm_machine_restart() to orion5x_restart()
to ensure that they continue to work as intended.

Acked-by: Nicolas Pitre <nico@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

arch/arm/mach-orion5x/mv2120-setup.c

@@ -234,5 +234,6 @@ MACHINE_START(MV2120, "HP Media Vault mv2120")
 	.init_early	= orion5x_init_early,
 	.init_irq	= orion5x_init_irq,
 	.timer		= &orion5x_timer,
-	.fixup		= tag_fixup_mem32
+	.fixup		= tag_fixup_mem32,
+	.restart	= orion5x_restart,
 MACHINE_END