watchdog: fix set_timeout operations

Since we changed the behaviour of the set_timeout operation in the
watchdog API, we need to change the allready converted drivers so
that they update the timeout field at the end of the set_timeout
operation.

Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
diff --git a/drivers/watchdog/pnx4008_wdt.c b/drivers/watchdog/pnx4008_wdt.c
index 3d9bb89..6b8432f 100644
--- a/drivers/watchdog/pnx4008_wdt.c
+++ b/drivers/watchdog/pnx4008_wdt.c
@@ -121,6 +121,7 @@
 static int pnx4008_wdt_set_timeout(struct watchdog_device *wdd,
 				    unsigned int new_timeout)
 {
+	wdd->timeout = new_timeout;
 	return 0;
 }