watchdog: softdog: convert to watchdog core

Convert softdog.c to the new watchdog API.

Signed-off-by: Alan Cox <[email protected]>
Signed-off-by: Wim Van Sebroeck <[email protected]>
diff --git a/drivers/watchdog/Kconfig b/drivers/watchdog/Kconfig
index 8f5c317..af74441 100644
--- a/drivers/watchdog/Kconfig
+++ b/drivers/watchdog/Kconfig
@@ -55,6 +55,7 @@
 
 config SOFT_WATCHDOG
 	tristate "Software watchdog"
+	select WATCHDOG_CORE
 	help
 	  A software monitoring watchdog. This will fail to reboot your system
 	  from some situations that the hardware watchdog will recover