mailbox: k3: Fix not calling dev_err with a device

dev needs to be gotten from mbox_chan
Signed-off-by: NSean Anderson <seanga2@gmail.com>
Reviewed-by: NSimon Glass <sjg@chromium.org>
Tested-by: NPatrick Delaunay <patrick.delaunay@st.com>

drivers/mailbox/k3-sec-proxy.c

@@ -212,14 +212,16 @@ static int k3_sec_proxy_send(struct mbox_chan *chan, const void *data)
 
 	ret = k3_sec_proxy_verify_thread(spt, THREAD_IS_TX);
 	if (ret) {
-		dev_err(dev, "%s: Thread%d verification failed. ret = %d\n",
+		dev_err(chan->dev,
+			"%s: Thread%d verification failed. ret = %d\n",
 			__func__, spt->id, ret);
 		return ret;
 	}
 
 	/* Check the message size. */
 	if (msg->len > spm->desc->max_msg_size) {
-		printf("%s: Thread %ld message length %zu > max msg size %d\n",
+		dev_err(chan->dev,
+			"%s: Thread %ld message length %zu > max msg size %d\n",
 		       __func__, chan->id, msg->len, spm->desc->max_msg_size);
 		return -EINVAL;
 	}