If the 'failed to find codec platform device' error path is executed, it should
jump to 'fail' label instead of returning an error immediately.

'fail' label will then free the ssi_np and codec_np previously acquired nodes.
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Mark Brown <broonie@linaro.org>