staging: vt6656: rxtx Replace vnt_tx_fifo_head wReserved

At run time wReserved has the value of wCurrentRate.

Replace with current_rate with __le16 base type and endian correct
wCurrentRate.
Signed-off-by: Malcolm Priestley <tvboxspy@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/vt6656/rxtx.c

@@ -800,7 +800,7 @@ static u16 s_vGenerateTxParameter(struct vnt_private *pDevice,
 	u16 wFifoCtl;
 	u8 byFBOption = AUTO_FB_NONE;
 
-	pFifoHead->wReserved = wCurrentRate;
+	pFifoHead->current_rate = cpu_to_le16(wCurrentRate);
 	wFifoCtl = pFifoHead->wFIFOCtl;
 
 	if (wFifoCtl & FIFOCTL_AUTO_FB_0)

drivers/staging/vt6656/rxtx.h

@@ -219,7 +219,7 @@ struct vnt_tx_fifo_head {
 	u16 wFIFOCtl;
 	__le16 time_stamp;
 	u16 wFragCtl;
-	u16 wReserved;
+	__le16 current_rate;
 } __packed;
 
 struct vnt_tx_buffer {