[WATCHDOG] Add support for the Avionic Design Xanthos watchdog timer.

This patch adds support for the watchdog timer on Avionic Design Xanthos
boards.

Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
Acked-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>

diff --git a/drivers/watchdog/Kconfig b/drivers/watchdog/Kconfig
index ff3eb8f..3711b88 100644
--- a/drivers/watchdog/Kconfig
+++ b/drivers/watchdog/Kconfig
@@ -282,6 +282,13 @@
 	  To compile this driver as a module, choose M here: the
 	  module will be called nuc900_wdt.
 
+config ADX_WATCHDOG
+	tristate "Avionic Design Xanthos watchdog"
+	depends on ARCH_PXA_ADX
+	help
+	  Say Y here if you want support for the watchdog timer on Avionic
+	  Design Xanthos boards.
+
 # AVR32 Architecture
 
 config AT32AP700X_WDT