mx31/mx35/mx51/mx53/mx6: add watchdog

Use a common watchdog driver for all these cpus.

Signed-off-by: Troy Kisky <troy.kisky@boundarydevices.com>
Acked-by: Stefano Babic <sbabic@denx.de>
diff --git a/board/hale/tt01/tt01.c b/board/hale/tt01/tt01.c
index 0c2cb79..b4b8209 100644
--- a/board/hale/tt01/tt01.c
+++ b/board/hale/tt01/tt01.c
@@ -179,7 +179,7 @@
 int board_late_init(void)
 {
 #ifdef CONFIG_HW_WATCHDOG
-	mxc_hw_watchdog_enable();
+	hw_watchdog_init();
 #endif
 
 	return 0;