watchdog: shwdt: Conversion to watchdog core.

Fairly straightforward conversion to utilize watchdog core support.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
diff --git a/drivers/watchdog/Kconfig b/drivers/watchdog/Kconfig
index 3709624..6795739 100644
--- a/drivers/watchdog/Kconfig
+++ b/drivers/watchdog/Kconfig
@@ -1138,6 +1138,7 @@
 config SH_WDT
 	tristate "SuperH Watchdog"
 	depends on SUPERH && (CPU_SH3 || CPU_SH4)
+	select WATCHDOG_CORE
 	help
 	  This driver adds watchdog support for the integrated watchdog in the
 	  SuperH processors. If you have one of these processors and wish