[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/spitz.c b/arch/arm/mach-pxa/spitz.c
index f697c49..7a0a430 100644
--- a/arch/arm/mach-pxa/spitz.c
+++ b/arch/arm/mach-pxa/spitz.c
@@ -701,10 +701,10 @@
 
 static void spitz_poweroff(void)
 {
-	arm_machine_restart('g');
+	arm_machine_restart('g', NULL);
 }
 
-static void spitz_restart(char mode)
+static void spitz_restart(char mode, const char *cmd)
 {
 	/* Bootloader magic for a reboot */
 	if((MSC0 & 0xffff0000) == 0x7ff00000)