ASoC: rl6347a: Use dev_err for I2C communication error prints

It's difficult to guess from bunch of "ret=-121" errors what driver and
device actually caused them. Since struct i2c_client has the dev pointer
use that for dev_err() with meaningful error message.
Signed-off-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/rl6347a.c

@@ -51,7 +51,7 @@ int rl6347a_hw_write(void *context, unsigned int reg, unsigned int value)
 	if (ret == 4)
 		return 0;
 	else
-		pr_err("ret=%d\n", ret);
+		dev_err(&client->dev, "I2C error %d\n", ret);
 	if (ret < 0)
 		return ret;
 	else