MAINTAINERS: add missing entry for include/hw/net/

Signed-off-by: NPhilippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: NHervé Poussineau <hpoussin@reactos.org>
Signed-off-by: NMichael Tokarev <mjt@tls.msk.ru>

MAINTAINERS

@@ -1004,6 +1004,7 @@ Network devices
 M: Jason Wang <jasowang@redhat.com>
 S: Odd Fixes
 F: hw/net/
+F: include/hw/net/
 F: tests/virtio-net-test.c
 T: git git://github.com/jasowang/qemu.git net