watchdog: Adding support for ARM Primecell SP805 Watchdog

Technical Reference Manual can be found at:
http://infocenter.arm.com/help/topic/com.arm.doc.ddi0270b/DDI0270.pdf

Signed-off-by: Viresh Kumar <viresh.kumar@st.com>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>

diff --git a/drivers/watchdog/Kconfig b/drivers/watchdog/Kconfig
index 910e09f..4d2992a 100644
--- a/drivers/watchdog/Kconfig
+++ b/drivers/watchdog/Kconfig
@@ -73,6 +73,13 @@
 
 # ARM Architecture
 
+config ARM_SP805_WATCHDOG
+	tristate "ARM SP805 Watchdog"
+	depends on ARM_AMBA
+	help
+	  ARM Primecell SP805 Watchdog timer. This will reboot your system when
+	  the timeout is reached.
+
 config AT91RM9200_WATCHDOG
 	tristate "AT91RM9200 watchdog"
 	depends on ARCH_AT91RM9200