watchdog: bcm6345: allow to use this driver on arm bcm6858

This IP is also used on some arm SoC, so we allow to
use it on arm bcm6858 too.

Signed-off-by: Philippe Reynes <philippe.reynes@softathome.com>
diff --git a/drivers/watchdog/Kconfig b/drivers/watchdog/Kconfig
index 10fd303..9456abd 100644
--- a/drivers/watchdog/Kconfig
+++ b/drivers/watchdog/Kconfig
@@ -88,7 +88,7 @@
 
 config WDT_BCM6345
 	bool "BCM6345 watchdog timer support"
-	depends on WDT && ARCH_BMIPS
+	depends on WDT && (ARCH_BMIPS || ARCH_BCM6858)
 	help
 	  Select this to enable watchdog timer for BCM6345 SoCs.
 	  The watchdog timer is stopped when initialized.