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 <[e-mail]>
Signed-off-by: Kalle Valo <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]

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

···
 			   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,