blackfin: bf60x: add hw watchdog support

Signed-off-by: Bob Liu <lliubbo@gmail.com>
Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Sonic Zhang <sonic.adi@gmail.com>
diff --git a/arch/blackfin/cpu/start.S b/arch/blackfin/cpu/start.S
index 90b4d1a..7155fc8 100644
--- a/arch/blackfin/cpu/start.S
+++ b/arch/blackfin/cpu/start.S
@@ -65,6 +65,7 @@
 	p5.h = HI(COREMMR_BASE);
 
 #ifdef CONFIG_HW_WATCHDOG
+#ifndef __ADSPBF60x__
 # ifndef CONFIG_HW_WATCHDOG_TIMEOUT_START
 #  define CONFIG_HW_WATCHDOG_TIMEOUT_START 5000
 # endif
@@ -78,6 +79,7 @@
 	/* fire up the watchdog - R0.L above needs to be 0x0000 */
 	W[p4 + (WDOG_CTL - SYSMMR_BASE)] = r0;
 #endif
+#endif
 
 	/* Turn on the serial for debugging the init process */
 	serial_early_init