Disintegrate asm/system.h for ARM

Disintegrate asm/system.h for ARM.

Signed-off-by: David Howells <dhowells@redhat.com>
cc: Russell King <linux@arm.linux.org.uk>
cc: linux-arm-kernel@lists.infradead.org
diff --git a/drivers/watchdog/wdt285.c b/drivers/watchdog/wdt285.c
index f551356..658a36d 100644
--- a/drivers/watchdog/wdt285.c
+++ b/drivers/watchdog/wdt285.c
@@ -32,6 +32,7 @@
 #include <mach/hardware.h>
 
 #include <asm/mach-types.h>
+#include <asm/system_info.h>
 #include <asm/hardware/dec21285.h>
 
 /*