staging: vt6656: s_vFillCTSHead remove camel case

Camel case changes
byPktType -> pkt_type
cbFrameLength -> frame_len
bNeedAck -> need_ack
pDevice -> priv
uCTSFrameLen -> cts_frame_len

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