MAINTAINERS: Add entry for XFRM documentation

XFRM patches are supposed to be sent to maintainers under "NETWORKING
[IPSEC]" heading, but it doesn't cover XFRM docs yet. Add the entry.

Reviewed-by: Randy Dunlap <rdunlap@infradead.org>
Tested-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Bagas Sanjaya <bagasdotme@gmail.com>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
diff --git a/MAINTAINERS b/MAINTAINERS
index d652f4f..4f33daa 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -18041,6 +18041,7 @@
 S:	Maintained
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec.git
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec-next.git
+F:	Documentation/networking/xfrm/
 F:	include/net/xfrm.h
 F:	include/uapi/linux/xfrm.h
 F:	net/ipv4/ah4.c