staging: vt6656: rxtx.c endian correct wTimeStampOff

wTimeStampOff needs to be endian corrected

Create new function vnt_time_stamp_off to return little endian u16 value.

Private variable byPreambleType is common to all calling functions is included.

variable rate to set the desired rate.

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