ASoC: Intel: mfld-pcm: Fix to use correct sst_data pointer

Signed-off-by: Subhransu S. Prusty <subhransu.s.prusty@intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Mark Brown <broonie@linaro.org>

sound/soc/intel/sst-mfld-platform-pcm.c

@@ -573,7 +573,7 @@ static int sst_platform_probe(struct platform_device *pdev)
 	struct sst_platform_data *pdata = pdev->dev.platform_data;
 
 	drv = devm_kzalloc(&pdev->dev, sizeof(*drv), GFP_KERNEL);
-	if (sst == NULL) {
+	if (drv == NULL) {
 		pr_err("kzalloc failed\n");
 		return -ENOMEM;
 	}