watchdog: pnx4008_wdt: fix broken email address

My Pengutronix address is not valid anymore, redirect people to the Pengutronix
kernel team.

Reported-by: Harald Geyer <harald@ccbib.org>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Acked-by: Robert Schwebel <r.schwebel@pengutronix.de>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>

drivers/watchdog/pnx4008_wdt.c

@@ -216,7 +216,7 @@ static struct platform_driver platform_wdt_driver = {
 module_platform_driver(platform_wdt_driver);
 
 MODULE_AUTHOR("MontaVista Software, Inc. <source@mvista.com>");
-MODULE_AUTHOR("Wolfram Sang <w.sang@pengutronix.de>");
+MODULE_AUTHOR("Wolfram Sang <kernel@pengutronix.de>");
 MODULE_DESCRIPTION("PNX4008 Watchdog Driver");
 
 module_param(heartbeat, uint, 0);