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 <[e-mail]>
Signed-off-by: Hans Verkuil <[e-mail]>
Signed-off-by: Mauro Carvalho Chehab <[e-mail]>

drivers/media/i2c/adv7842.c

···
 		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;
 }