MAINTAINERS: Update XDP and AF_XDP entries

Getting too many false positive matches with current use
of the content regex K: and file regex N: patterns.

This patch drops file match N: and makes K: more restricted.
Some more normal F: file wildcards are added.

Notice that AF_XDP forgot to some F: files that is also
updated in this patch.

Suggested-by: Jakub Kicinski <[e-mail]>
Signed-off-by: Jesper Dangaard Brouer <[e-mail]>
Signed-off-by: Daniel Borkmann <[e-mail]>
Acked-by: Björn Töpel <[e-mail]>
Link: https://lore.kernel.org/bpf/160586238944.2808432.4401269290440394008.stgit@firesoul

MAINTAINERS

···
 L:	[e-mail]
 S:	Supported
 F:	include/net/xdp.h
+F:	include/net/xdp_priv.h
 F:	include/trace/events/xdp.h
 F:	kernel/bpf/cpumap.c
 F:	kernel/bpf/devmap.c
 F:	net/core/xdp.c
-N:	xdp
-K:	xdp
+F:	samples/bpf/xdp*
+F:	tools/testing/selftests/bpf/*xdp*
+F:	tools/testing/selftests/bpf/*/*xdp*
+F:	drivers/net/ethernet/*/*/*/*/*xdp*
+F:	drivers/net/ethernet/*/*/*xdp*
+K:	(?:\b|_)xdp(?:\b|_)
 
 XDP SOCKETS (AF_XDP)
 M:	Björn Töpel <[e-mail]>
···
 L:	[e-mail]
 L:	[e-mail]
 S:	Maintained
+F:	Documentation/networking/af_xdp.rst
 F:	include/net/xdp_sock*
 F:	include/net/xsk_buff_pool.h
 F:	include/uapi/linux/if_xdp.h
+F:	include/uapi/linux/xdp_diag.h
+F:	include/net/netns/xdp.h
 F:	net/xdp/
 F:	samples/bpf/xdpsock*
 F:	tools/lib/bpf/xsk*