rt2x00: Update MAINTAINERS

Add myself to the list of maintainers for the rt2x00 driver.
Signed-off-by: Gertjan van Wingerde <gwingerde@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

MAINTAINERS

@@ -4281,6 +4281,7 @@ F:	drivers/video/aty/aty128fb.c
 RALINK RT2X00 WIRELESS LAN DRIVER
 P:	rt2x00 project
 M:	Ivo van Doorn <IvDoorn@gmail.com>
+M:	Gertjan van Wingerde <gwingerde@gmail.com>
 L:	linux-wireless@vger.kernel.org
 L:	users@rt2x00.serialmonkey.com (moderated for non-subscribers)
 W:	http://rt2x00.serialmonkey.com/