staging: vt6656: vnt_fill_ieee80211_rts replace TYPE_CTL_RTS macro

Replace with IEEE80211_FTYPE_CTL | IEEE80211_STYPE_RTS from linux/ieee80211.h
to get value of TYPE_CTL_RTS and endian correct to frame_control.

Remove old macros in tether.h

Signed-off-by: Malcolm Priestley <tvboxspy@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>