MAINTAINERS: Add header files to NETWORKING sections

This is part of an effort to assign a section in MAINTAINERS to header
files that relate to Networking. In this case the files with "net" or
"skbuff" in their name.

This patch adds a number of such files to the NETWORKING DRIVERS
and NETWORKING [GENERAL] sections.
Signed-off-by: Simon Horman <horms@kernel.org>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

MAINTAINERS

@@ -15879,13 +15879,16 @@ F:	drivers/net/
 F:	include/dt-bindings/net/
 F:	include/linux/cn_proc.h
 F:	include/linux/etherdevice.h
+F:	include/linux/ethtool_netlink.h
 F:	include/linux/fcdevice.h
 F:	include/linux/fddidevice.h
 F:	include/linux/hippidevice.h
 F:	include/linux/if_*
 F:	include/linux/inetdevice.h
 F:	include/linux/netdev*
+F:	include/linux/platform_data/wiznet.h
 F:	include/uapi/linux/cn_proc.h
+F:	include/uapi/linux/ethtool_netlink.h
 F:	include/uapi/linux/if_*
 F:	include/uapi/linux/netdev*
 F:	tools/testing/selftests/drivers/net/
@@ -15939,14 +15942,28 @@ F:	include/linux/framer/framer-provider.h
 F:	include/linux/framer/framer.h
 F:	include/linux/in.h
 F:	include/linux/indirect_call_wrapper.h
+F:	include/linux/inet.h
+F:	include/linux/inet_diag.h
 F:	include/linux/net.h
 F:	include/linux/netdev*
+F:	include/linux/netlink.h
+F:	include/linux/netpoll.h
+F:	include/linux/rtnetlink.h
+F:	include/linux/seq_file_net.h
 F:	include/linux/skbuff*
 F:	include/net/
+F:	include/uapi/linux/genetlink.h
+F:	include/uapi/linux/hsr_netlink.h
 F:	include/uapi/linux/in.h
+F:	include/uapi/linux/inet_diag.h
+F:	include/uapi/linux/nbd-netlink.h
 F:	include/uapi/linux/net.h
 F:	include/uapi/linux/net_namespace.h
+F:	include/uapi/linux/netconf.h
 F:	include/uapi/linux/netdev*
+F:	include/uapi/linux/netlink.h
+F:	include/uapi/linux/netlink_diag.h
+F:	include/uapi/linux/rtnetlink.h
 F:	lib/net_utils.c
 F:	lib/random32.c
 F:	net/