MAINTAINERS: update DASD maintainer

Signed-off-by: Stefan Haberland <sth@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

MAINTAINERS

@@ -10076,8 +10076,8 @@ S:	Supported
 F:	drivers/s390/cio/
 
 S390 DASD DRIVER
-M:	Stefan Weinhuber <wein@de.ibm.com>
-M:	Stefan Haberland <stefan.haberland@de.ibm.com>
+M:	Stefan Haberland <sth@linux.vnet.ibm.com>
+M:	Jan Hoeppner <hoeppner@linux.vnet.ibm.com>
 L:	linux-s390@vger.kernel.org
 W:	http://www.ibm.com/developerworks/linux/linux390/
 S:	Supported