wireless: rt2x00: fix driver menu indenting

Michael Büker <m.bueker@berlin.de> reports that the RT2x00 drivers
are not indented as they should be, so use proper dependencies to make
them be indented as expected.

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Ack-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>