mt76: remove mcu_msg_alloc

We almost always use patter like this:

       skb = mt76_mcu_msg_alloc(dev, &msg, sizeof(msg));
       return mt76_mcu_send_msg(dev, skb, CMD_FUN_SET_OP, wait_resp);

This is not needed, we can allocate skb in mcu_send_msg routine.

Signed-off-by: Stanislaw Gruszka <[email protected]>

mt76x2/pci_mcu.c

@@ -168,7 +168,6 @@ error:
 int mt76x2_mcu_init(struct mt76x02_dev *dev)
 {
 	static const struct mt76_mcu_ops mt76x2_mcu_ops = {
-		.mcu_msg_alloc = mt76x02_mcu_msg_alloc,
 		.mcu_send_msg = mt76x02_mcu_msg_send,
 	};
 	int ret;