MAINTAINERS: NETWORKING DRIVERS matches too much

File pattern include/linux/*device.h matches too much, including
completely unrelated files. Replace it with an explicit list of
network device-related header files.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: Joe Perches <joe@perches.com>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: David S. Miller <davem@davemloft.net>