iio: dac: mcp4725: set iio name property in sysfs

Without this change, the name entity for mcp4725 is missing in
/sys/bus/iio/devices/iio\:device*/name

With this change, name is reported correctly
Signed-off-by: NYong Li <sdliyong@gmail.com>
Cc: <Stable@vger.kernel.org>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

drivers/iio/dac/mcp4725.c

@@ -300,6 +300,7 @@ static int mcp4725_probe(struct i2c_client *client,
 	data->client = client;
 
 	indio_dev->dev.parent = &client->dev;
+	indio_dev->name = id->name;
 	indio_dev->info = &mcp4725_info;
 	indio_dev->channels = &mcp4725_channel;
 	indio_dev->num_channels = 1;