gtp: add MAINTAINERS

Add maintainers for this tunnel driver. Include main osmocom.org mailist
list too.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

MAINTAINERS

@@ -5638,6 +5638,14 @@ T:	git git://linuxtv.org/media_tree.git
 S:	Odd Fixes
 F:	drivers/media/usb/gspca/
 
+GTP (GPRS Tunneling Protocol)
+M:	Pablo Neira Ayuso <pablo@netfilter.org>
+M:	Harald Welte <laforge@gnumonks.org>
+L:	osmocom-net-gprs@lists.osmocom.org
+T:	git git://git.kernel.org/pub/scm/linux/kernel/git/pablo/gtp.git
+S:	Maintained
+F:	drivers/net/gtp.c
+
 GUID PARTITION TABLE (GPT)
 M:	Davidlohr Bueso <dave@stgolabs.net>
 L:	linux-efi@vger.kernel.org