media: i2c: adv7842: convert to i2c_new_dummy_device

Move away from the to-be-removed i2c_new_dummy() to
i2c_new_dummy_device(). So, we now get an ERRPTR which we use in error
handling by printing the error code. To keep the rest of the driver
logic as is, internally a NULL ptr is still kept.
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

drivers/media/i2c/adv7842.c

@@ -3400,9 +3400,12 @@ static struct i2c_client *adv7842_dummy_client(struct v4l2_subdev *sd, const cha
 		return NULL;
 	}
 
-	cp = i2c_new_dummy(client->adapter, io_read(sd, io_reg) >> 1);
-	if (!cp)
-		v4l2_err(sd, "register %s on i2c addr 0x%x failed\n", desc, addr);
+	cp = i2c_new_dummy_device(client->adapter, io_read(sd, io_reg) >> 1);
+	if (IS_ERR(cp)) {
+		v4l2_err(sd, "register %s on i2c addr 0x%x failed with %ld\n",
+			 desc, addr, PTR_ERR(cp));
+		cp = NULL;
+	}
 
 	return cp;
 }