mpc85xx: watchdog initialisation added

Function to inititialize the cpu watchdog added.

Signed-off-by: Rainer Boschung <rainer.boschung@keymile.com>
[York Sun: Add prototype in watchdog.h]
Reviewed-by: York Sun <yorksun@freescale.com>
diff --git a/include/watchdog.h b/include/watchdog.h
index aacacb9..bd0a8d6 100644
--- a/include/watchdog.h
+++ b/include/watchdog.h
@@ -95,4 +95,8 @@
 #if defined(CONFIG_HW_WATCHDOG) && !defined(__ASSEMBLY__)
 	void hw_watchdog_init(void);
 #endif
+
+#if defined(CONFIG_MPC85xx) && !defined(__ASSEMBLY__)
+	void init_85xx_watchdog(void);
+#endif
 #endif /* _WATCHDOG_H_ */