ASoC: Intel: haswell: Simplify device probe

With legacy ADSP private context adjusted, there is no need for double
safety.
Signed-off-by: Cezary Rojewski <cezary.rojewski@intel.com>
Link: https://lore.kernel.org/r/20190822113616.22702-3-cezary.rojewski@intel.comTested-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/intel/boards/haswell.c

@@ -188,18 +188,14 @@ static struct snd_soc_card haswell_rt5640 = {
 static int haswell_audio_probe(struct platform_device *pdev)
 {
 	struct snd_soc_acpi_mach *mach;
-	const char *platform_name = NULL;
 	int ret;
 
 	haswell_rt5640.dev = &pdev->dev;
 
 	/* override plaform name, if required */
 	mach = (&pdev->dev)->platform_data;
-	if (mach) /* extra check since legacy does not pass parameters */
-		platform_name = mach->mach_params.platform;
-
 	ret = snd_soc_fixup_dai_links_platform_name(&haswell_rt5640,
-						    platform_name);
+						    mach->mach_params.platform);
 	if (ret)
 		return ret;