staging: vt6656: s_uGetRTSCTSDuration remove camel case

camel case changes
pDevice -> priv
byDurType -> dur_type
cbFrameLength -> frame_length
byPktType -> pkt_type
wRate -> rate
bNeedAck -> need_ack
uCTSTime -> cts_time
uDurTime -> dur_time

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