media: amphion: use dev_err_probe

This simplifies the code and silences -517 error messages. Also
the reason is listed in /sys/kernel/debug/devices_deferred.
Signed-off-by: Alexander Stein <alexander.stein@ew.tq-group.com>
Reviewed-by: ming_qian <ming.qian@nxp.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

drivers/media/platform/amphion/vpu_mbox.c

@@ -46,11 +46,10 @@ static int vpu_mbox_request_channel(struct device *dev, struct vpu_mbox *mbox)
 	cl->rx_callback = vpu_mbox_rx_callback;
 
 	ch = mbox_request_channel_byname(cl, mbox->name);
-	if (IS_ERR(ch)) {
-		dev_err(dev, "Failed to request mbox chan %s, ret : %ld\n",
-			mbox->name, PTR_ERR(ch));
-		return PTR_ERR(ch);
-	}
+	if (IS_ERR(ch))
+		return dev_err_probe(dev, PTR_ERR(ch),
+				     "Failed to request mbox chan %s\n",
+				     mbox->name);
 
 	mbox->ch = ch;
 	return 0;