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>