[PATCH 4/7] ASoC: Intel: Skylake: Shield against no-NHLT configurations

[Pierre-Louis Bossart]

> -	intel_nhlt_free(skl->nhlt);
> +	if (skl->nhlt)
> +		intel_nhlt_free(skl->nhlt);

we could alternatively move the test in intel_nhlt_free, which seems 
like a more robust thing to do?