staging: rts5139: remove unused option->needs_remote_wakeup

module parametr needs_remote_wakeup sets
option->needs_remote_wakeup and
rts51x->pusb_intf->needs_remote_wakeup

the second may be used, the first one is never used

Signed-off-by: Oleksij Rempel <bug-track@fisher-privat.net>
Acked-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>