mt76: move mt76_mcu_get_response in mt76-core

Move mt76_mcu_get_response in mt76-core module and remove duplicated
code. mt76_mcu_get_response will be reused adding support for mt7603
driver

Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi@redhat.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>

drivers/net/wireless/mediatek/mt76/mt76.h

@@ -754,6 +754,8 @@ void mt76u_queues_deinit(struct mt76_dev *dev);
 struct sk_buff *
 mt76_mcu_msg_alloc(const void *data, int head_len,
 		   int data_len, int tail_len);
+struct sk_buff *mt76_mcu_get_response(struct mt76_dev *dev,
+				      unsigned long expires);
 
 void mt76u_mcu_complete_urb(struct urb *urb);
 int mt76u_mcu_init_rx(struct mt76_dev *dev);