watchdog: bcm281xx: Watchdog Driver

This commit adds support for the watchdog timer used on the BCM281xx
family of SoCs.

Signed-off-by: Markus Mayer <markus.mayer@linaro.org>
Reviewed-by: Matt Porter <matt.porter@linaro.org>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
diff --git a/arch/arm/configs/bcm_defconfig b/arch/arm/configs/bcm_defconfig
index 2c38fdf..fc3afd8 100644
--- a/arch/arm/configs/bcm_defconfig
+++ b/arch/arm/configs/bcm_defconfig
@@ -126,3 +126,5 @@
 CONFIG_XZ_DEC=y
 CONFIG_AVERAGE=y
 CONFIG_PINCTRL_CAPRI=y
+CONFIG_WATCHDOG=y
+CONFIG_BCM_KONA_WDT=y