[WATCHDOG] Add support for the built-int RDC R-321x SoC watchdog

This patch adds support for the built-in RDC R-321x SoC watchdog.

Signed-off-by: Florian Fainelli <florian.fainelli@telecomint.eu>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>

diff --git a/drivers/watchdog/Kconfig b/drivers/watchdog/Kconfig
index a8e80f2..a1f47c7 100644
--- a/drivers/watchdog/Kconfig
+++ b/drivers/watchdog/Kconfig
@@ -465,6 +465,16 @@
 
 	  Most people will say N.
 
+config RDC321X_WDT
+	tristate "RDC R-321x SoC watchdog"
+	depends on X86_RDC321X
+	help
+	  This is the driver for the built in hardware watchdog
+	  in the RDC R-321x SoC.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called rdc321x_wdt.
+
 config 60XX_WDT
 	tristate "SBC-60XX Watchdog Timer"
 	depends on X86