staging: vt6656: Use vnt_rx_tail struct for tail variables.

Place tsf_time, sq, new_rsr, rssi, rsr and sq3 packed in the structure.

Unused variables are removed along with skb_data and structure is
placed beyond vnt_rx_header + pay_load_with_padding on skb->data.

Signed-off-by: Malcolm Priestley <tvboxspy@gmail.com>
Link: https://lore.kernel.org/r/6ac6eae0-7b71-fefe-9230-da3b345b634b@gmail.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>