[ARM] pass reboot command line to arch_reset()

OMAP wishes to pass state to the boot loader upon reboot in order to
instruct it whether to wait for USB-based reflashing or not.  There is
already a facility to do this via the reboot() syscall, except we ignore
the string passed to machine_restart().

This patch fixes things to pass this string to arch_reset().  This means
that we keep the reboot mode limited to telling the kernel _how_ to
perform the reboot which should be independent of what we request the
boot loader to do.

Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/mach-pxa/mioa701.c b/arch/arm/mach-pxa/mioa701.c
index 0257727..97c93a7 100644
--- a/arch/arm/mach-pxa/mioa701.c
+++ b/arch/arm/mach-pxa/mioa701.c
@@ -788,13 +788,13 @@
 static void mioa701_poweroff(void)
 {
 	mioa701_machine_exit();
-	arm_machine_restart('s');
+	arm_machine_restart('s', NULL);
 }
 
-static void mioa701_restart(char c)
+static void mioa701_restart(char c, const char *cmd)
 {
 	mioa701_machine_exit();
-	arm_machine_restart('s');
+	arm_machine_restart('s', cmd);
 }
 
 struct gpio_ress global_gpios[] = {