regulator: mt6397: Add OF match table

The Documentation/devicetree/bindings/regulator/mt6397-regulator.txt doc
mentions that a compatible "mediatek,mt6397-regulator" is required for
the MT6397 device node but the driver doesn't provide a OF match table so
the platform bus .match fallbacks to match using the driver name instead.

This also means that module auto-loading is broken for this driver since
the MFD driver that register the device, has a .of_compatible set so the
platform .uevent callback reports a OF modalias that's not in the module.
Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

drivers/regulator/mt6397-regulator.c

@@ -323,9 +323,16 @@ static const struct platform_device_id mt6397_platform_ids[] = {
 };
 MODULE_DEVICE_TABLE(platform, mt6397_platform_ids);
 
+static const struct of_device_id mt6397_of_match[] = {
+	{ .compatible = "mediatek,mt6397-regulator", },
+	{ /* sentinel */ },
+};
+MODULE_DEVICE_TABLE(of, mt6397_of_match);
+
 static struct platform_driver mt6397_regulator_driver = {
 	.driver = {
 		.name = "mt6397-regulator",
+		.of_match_table = of_match_ptr(mt6397_of_match),
 	},
 	.probe = mt6397_regulator_probe,
 	.id_table = mt6397_platform_ids,