Bluetooth: Fix breakage in amp_write_rem_assoc_frag()

We should be passing the pointer itself instead of the address of the
pointer.

This was a copy and paste bug when we replaced the calls to
hci_send_cmd().  Originally, the arguments were "len, cp" but we
overwrote them with "sizeof(cp), &cp" by mistake.

Fixes: b3d3914006 ('Bluetooth: Move amp assoc read/write completed callback to amp.c')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

net/bluetooth/amp.c

@@ -379,7 +379,7 @@ static bool amp_write_rem_assoc_frag(struct hci_dev *hdev,
 	amp_ctrl_put(ctrl);
 
 	hci_req_init(&req, hdev);
-	hci_req_add(&req, HCI_OP_WRITE_REMOTE_AMP_ASSOC, sizeof(cp), &cp);
+	hci_req_add(&req, HCI_OP_WRITE_REMOTE_AMP_ASSOC, len, cp);
 	hci_req_run_skb(&req, write_remote_amp_assoc_complete);
 
 	kfree(cp);