MAINTAINERS: fix bouncing tun/tap entries

Delivery to the following recipient failed permanently:

     vtun@office.satix.net

Technical details of permanent failure:
DNS Error: Domain name not found

Of course:
$ host office.satix.net
Host office.satix.net not found: 3(NXDOMAIN)

===========

And "Change of Email Address Notification":
Old Address        New Address           Email Subject
------------------------------------------------------
maxk@qualcomm.com  maxk@qti.qualcomm.com "tuntap: multiqueue...
Signed-off-by: NJiri Slaby <jslaby@suse.cz>
Cc: Maxim Krasnyansky <maxk@qti.qualcomm.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

MAINTAINERS

@@ -7454,8 +7454,7 @@ S:	Maintained
 F:	drivers/net/ethernet/dec/tulip/
 
 TUN/TAP driver
-M:	Maxim Krasnyansky <maxk@qualcomm.com>
-L:	vtun@office.satix.net
+M:	Maxim Krasnyansky <maxk@qti.qualcomm.com>
 W:	http://vtun.sourceforge.net/tun
 S:	Maintained
 F:	Documentation/networking/tuntap.txt