[ARM] sa1100_wdt: use reset_status to remember watchdog reset status

Signed-off-by: NEric Miao <eric.miao@marvell.com>

drivers/watchdog/sa1100_wdt.c

@@ -31,6 +31,8 @@
 #include <asm/arch/pxa-regs.h>
 #endif
 
+#include <asm/arch/reset.h>
+
 #include <asm/hardware.h>
 #include <asm/uaccess.h>
 
@@ -162,7 +164,8 @@ static int __init sa1100dog_init(void)
 	 * we suspend, RCSR will be cleared, and the watchdog
 	 * reset reason will be lost.
 	 */
-	boot_status = (RCSR & RCSR_WDR) ? WDIOF_CARDRESET : 0;
+	boot_status = (reset_status & RESET_STATUS_WATCHDOG) ?
+				WDIOF_CARDRESET : 0;
 	pre_margin = OSCR_FREQ * margin;
 
 	ret = misc_register(&sa1100dog_miscdev);