orinoco: Annotate ezusb_write_ltv()

All invocation of ezusb_write_ltv() happen via ->write_ltv() and are
performed under the orinoco_lock() which disables BH.

Use ezusb_req_ctx_wait_poll() for ezusb_write_ltv() because it must not
sleep.
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20201113212252.2243570-8-bigeasy@linutronix.de

drivers/net/wireless/intersil/orinoco/orinoco_usb.c

@@ -1029,7 +1029,7 @@ static int ezusb_write_ltv(struct hermes *hw, int bap, u16 rid,
 			   u16 length, const void *data)
 {
 	return __ezusb_write_ltv(hw, bap, rid, length, data,
-				 ezusb_req_ctx_wait);
+				 ezusb_req_ctx_wait_poll);
 }
 
 static int ezusb_read_ltv(struct hermes *hw, int bap, u16 rid,