staging: vt6656: rxtx.c s_create new function to endian correct uGetTxRsvTime.

We can't endian correct uGetTxRsvTime because it is called by other functions.

Create new function to vnt_rxtx_rsvtime_le16 to return little endian u16
value.

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