staging: vt6655: s_vGenerateTxParameter Replace PSTxBufHead with struct vnt_tx_fifo_head

With endian correction on fifo_ctl and current_rate.

Removing pTxBufHead, pFifoHead and wFifoCtl

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