watchdog: add JZ4740 watchdog driver

Adds support for the hardware watchdog found in Ingenic's jz4740
System-on-Chip.

Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>

diff --git a/drivers/watchdog/Kconfig b/drivers/watchdog/Kconfig
index 229a9c1..6041692 100644
--- a/drivers/watchdog/Kconfig
+++ b/drivers/watchdog/Kconfig
@@ -905,6 +905,12 @@
 	  timer expired and no process has written to /dev/watchdog during
 	  that time.
 
+config JZ4740_WDT
+	tristate "Ingenic jz4740 SoC hardware watchdog"
+	depends on MACH_JZ4740
+	help
+	  Hardware driver for the built-in watchdog timer on Ingenic jz4740 SoCs.
+
 config WDT_MTX1
 	tristate "MTX-1 Hardware Watchdog"
 	depends on MIPS_MTX1