iio: adc128s052: Add OF match table

The Documentation/devicetree/bindings/iio/adc/ti-adc128s052.txt DT binding
doc lists "ti,adc128s052" or "ti,adc122s021" as compatible strings but the
corresponding driver does not have an OF match table. Add the table to the
driver so the SPI core can do an OF style match.
Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

drivers/iio/adc/ti-adc128s052.c

@@ -174,6 +174,13 @@ static int adc128_remove(struct spi_device *spi)
 	return 0;
 }
 
+static const struct of_device_id adc128_of_match[] = {
+	{ .compatible = "ti,adc128s052", },
+	{ .compatible = "ti,adc122s021", },
+	{ /* sentinel */ },
+};
+MODULE_DEVICE_TABLE(of, adc128_of_match);
+
 static const struct spi_device_id adc128_id[] = {
 	{ "adc128s052", 0},	/* index into adc128_config */
 	{ "adc122s021",	1},
@@ -184,6 +191,7 @@ MODULE_DEVICE_TABLE(spi, adc128_id);
 static struct spi_driver adc128_driver = {
 	.driver = {
 		.name = "adc128s052",
+		.of_match_table = of_match_ptr(adc128_of_match),
 		.owner = THIS_MODULE,
 	},
 	.probe = adc128_probe,