watchdog: Add MCF548x watchdog driver.

Add watchdog driver for MCF548x.

Signed-off-by: Philippe De Muyter <phdm@macqel.be>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>

diff --git a/drivers/watchdog/Kconfig b/drivers/watchdog/Kconfig
index 68a9527..2e2400e 100644
--- a/drivers/watchdog/Kconfig
+++ b/drivers/watchdog/Kconfig
@@ -862,7 +862,12 @@
 
 # M68K Architecture
 
-# M68KNOMMU Architecture
+config M548x_WATCHDOG
+	tristate "MCF548x watchdog support"
+	depends on M548x
+	help
+	  To compile this driver as a module, choose M here: the
+	  module will be called m548x_wdt.
 
 # MIPS Architecture