r92su: fix minor typo

and remove a empty line.

Signed-off-by: Christian Lamparter <chunkeey@googlemail.com>
r92su: explain why r92su_set_wiphy_params is not implemented

Signed-off-by: Christian Lamparter <chunkeey@googlemail.com>
r92su: tear down link when device dies

Signed-off-by: Christian Lamparter <chunkeey@googlemail.com>
r92su: start with r92su_get_station

Implement get_station for iw link and friends.

Signed-off-by: Christian Lamparter <chunkeey@googlemail.com>