[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>

arch/arm/mach-pxa/poodle.c

@@ -501,12 +501,12 @@ static struct platform_device *devices[] __initdata = {
 
 static void poodle_poweroff(void)
 {
-	arm_machine_restart('h');
+	arm_machine_restart('h', NULL);
 }
 
-static void poodle_restart(char mode)
+static void poodle_restart(char mode, const char *cmd)
 {
-	arm_machine_restart('h');
+	arm_machine_restart('h', cmd);
 }
 
 static void __init poodle_init(void)