libertas: don't clear priv->dnld_sent after sending sleep confirm

DNLD_RES_RECEIVED is a bit of a misnomer -- we never wait for the result
to be received; it's purely representing the state of the TX path, and
in this case the TX path is definitely busy.

Of course, that means that we don't actually care about DATA_SENT vs.
CMD_SENT either, but that's a can of worms for another day...
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/libertas/cmd.c

@@ -2000,7 +2000,6 @@ static int sendconfirmsleep(struct lbs_private *priv, u8 *cmdptr, u16 size)
 	lbs_deb_hex(LBS_DEB_HOST, "sleep confirm command", cmdptr, size);
 
 	ret = priv->hw_host_to_card(priv, MVMS_CMD, cmdptr, size);
-	priv->dnld_sent = DNLD_RES_RECEIVED;
 
 	spin_lock_irqsave(&priv->driver_lock, flags);
 	if (priv->intcounter || priv->currenttxskb)