watchdog: cadence: Remove Kconfig dependency on ARCH

Remove Kconfig dependency and enable driver for
all ARCHs.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>

drivers/watchdog/Kconfig

@@ -169,7 +169,6 @@ config AT91SAM9X_WATCHDOG
 
 config CADENCE_WATCHDOG
 	tristate "Cadence Watchdog Timer"
-	depends on ARM
 	select WATCHDOG_CORE
 	help
 	  Say Y here if you want to include support for the watchdog