This selects a driver for the Broadcom BCM2835 SPI master.
--- a/drivers/watchdog/Kconfig
+++ b/drivers/watchdog/Kconfig
-@@ -1291,7 +1291,7 @@ config BCM63XX_WDT
+@@ -1282,7 +1282,7 @@ config BCM63XX_WDT
config BCM2835_WDT
tristate "Broadcom BCM2835 hardware watchdog"