ASoc: cs42xx8-i2c.c: add module device table for of

When trying to connect the device with the driver through of
it is not working. The of_device_id is defined in cs42xx8.c
but is not correctly included in cs42xx8-i2c.c. Also add the
matching table for of in the i2c file.

Signed-off-by: Peter Bergin <peter@berginkonsult.se>

sound/soc/codecs/cs42xx8-i2c.c

@@ -37,6 +37,13 @@ static int cs42xx8_i2c_remove(struct i2c_client *i2c)
 	return 0;
 }
 
+const struct of_device_id cs42xx8_of_match[] = {
+	{ .compatible = "cirrus,cs42448", .data = &cs42448_data, },
+	{ .compatible = "cirrus,cs42888", .data = &cs42888_data, },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, cs42xx8_of_match);
+
 static struct i2c_device_id cs42xx8_i2c_id[] = {
 	{"cs42448", (kernel_ulong_t)&cs42448_data},
 	{"cs42888", (kernel_ulong_t)&cs42888_data},