Add RT3071 specific register initializations to rt2x00, based on the latest
Ralink rt3070 vendor driver.

With this patch my RT3071 based devices start showing a sign of life.
Signed-off-by: Gertjan van Wingerde <gwingerde@gmail.com>
Acked-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>