rsi: remove redundant assignment

INVALID_QUEUE has been used as a return value,it is not necessary to
assign it to q_num,so just return INVALID_QUEUE.
Signed-off-by: wengjianfeng <wengjianfeng@yulong.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20210203062717.1228-1-samirweng1979@163.com

drivers/net/wireless/rsi/rsi_91x_core.c

@@ -193,8 +193,7 @@ static u8 rsi_core_determine_hal_queue(struct rsi_common *common)
 		if (recontend_queue)
 			goto get_queue_num;
 
-		q_num = INVALID_QUEUE;
-		return q_num;
+		return INVALID_QUEUE;
 	}
 
 	common->selected_qnum = q_num;