isdn/gigaset: cede maintainership

As German phone operators are discontinuing ISDN service, neither
Hansjörg nor I will be able to maintain the Gigaset ISDN drivers
any longer. Paul Bolle offered to step into the breach for odd
fixes.
Signed-off-by: Tilman Schmidt <tilman@imap.cc>
Acked-by: Paul Bolle <pebolle@tiscali.nl>
Signed-off-by: David S. Miller <davem@davemloft.net>

MAINTAINERS

@@ -4364,11 +4364,10 @@ F:	fs/gfs2/
 F:	include/uapi/linux/gfs2_ondisk.h
 
 GIGASET ISDN DRIVERS
-M:	Hansjoerg Lipp <hjlipp@web.de>
-M:	Tilman Schmidt <tilman@imap.cc>
+M:	Paul Bolle <pebolle@tiscali.nl>
 L:	gigaset307x-common@lists.sourceforge.net
 W:	http://gigaset307x.sourceforge.net/
-S:	Maintained
+S:	Odd Fixes
 F:	Documentation/isdn/README.gigaset
 F:	drivers/isdn/gigaset/
 F:	include/uapi/linux/gigaset_dev.h