media: si470x-i2c: Add device tree support

This commit enables device tree support adding simple of_match table.

Signed-off-by: Pawe? Chmiel <pawel.mikolaj.chmiel@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

drivers/media/radio/si470x/radio-si470x-i2c.c

@@ -527,6 +527,13 @@ static int si470x_i2c_resume(struct device *dev)
 static SIMPLE_DEV_PM_OPS(si470x_i2c_pm, si470x_i2c_suspend, si470x_i2c_resume);
 #endif
 
+#if IS_ENABLED(CONFIG_OF)
+static const struct of_device_id si470x_of_match[] = {
+	{ .compatible = "silabs,si470x" },
+	{ },
+};
+MODULE_DEVICE_TABLE(of, si470x_of_match);
+#endif
 
 /*
  * si470x_i2c_driver - i2c driver interface
@@ -534,6 +541,7 @@ static SIMPLE_DEV_PM_OPS(si470x_i2c_pm, si470x_i2c_suspend, si470x_i2c_resume);
 static struct i2c_driver si470x_i2c_driver = {
 	.driver = {
 		.name		= "si470x",
+		.of_match_table = of_match_ptr(si470x_of_match),
 #ifdef CONFIG_PM_SLEEP
 		.pm		= &si470x_i2c_pm,
 #endif