As noted by John Linville, the RTL818X maintainers have "moved on", and the
responsibilities for RTL8180 and RTL8187 have been split. This is the
corresponding update of MAINTAINERS.

Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Acked-by: Herton Ronaldo Krzesinski <herton@mandriva.com.br>
Acked-by: Hin-Tak Leung <htl10@users.sourceforge.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>