ASoC: soc-pcm: Fix an uninitialized error code

The error path here doesn't set "ret" so it returns uninitialized data
instead of a negative error code.

Fixes: 2c138284 ("ASoC: soc-pcm: disconnect BEs if the FE is not ready")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Link: https://lore.kernel.org/r/X/wfXQFxeMLvpO+1@mwandaSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/soc-pcm.c

@@ -2444,6 +2444,7 @@ static int dpcm_run_update_startup(struct snd_soc_pcm_runtime *fe, int stream)
 		ret = -EINVAL;
 		dev_err(fe->dev, "ASoC: FE %s is not ready %d\n",
 			fe->dai_link->name, fe->dpcm[stream].state);
+		ret = -EINVAL;
 		goto disconnect;
 	}