ARM: restart: iop3xx: use new restart hook

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

In doing so, we split out the n2100 platform specific restart handler
into the n2100 platform file.

Acked-by: Lennert Buytenhek <buytenh@wantstofly.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/mach-iop32x/n2100.c b/arch/arm/mach-iop32x/n2100.c
index d726927..6b6d559 100644
--- a/arch/arm/mach-iop32x/n2100.c
+++ b/arch/arm/mach-iop32x/n2100.c
@@ -291,6 +291,14 @@
 		;
 }
 
+static void n2100_restart(char mode, const char *cmd)
+{
+	gpio_line_set(N2100_HARDWARE_RESET, GPIO_LOW);
+	gpio_line_config(N2100_HARDWARE_RESET, GPIO_OUT);
+	while (1)
+		;
+}
+
 
 static struct timer_list power_button_poll_timer;
 
@@ -332,4 +340,5 @@
 	.init_irq	= iop32x_init_irq,
 	.timer		= &n2100_timer,
 	.init_machine	= n2100_init_machine,
+	.restart	= n2100_restart,
 MACHINE_END