ASoC: Intel: mfld-pcm: Allocate platform data

Platform data may be null during platform_device_add. Allocate platform
data before using.
Signed-off-by: NSubhransu S. Prusty <subhransu.s.prusty@intel.com>
Signed-off-by: NVinod Koul <vinod.koul@intel.com>
Signed-off-by: NMark Brown <broonie@linaro.org>

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

@@ -570,7 +570,7 @@ static int sst_platform_probe(struct platform_device *pdev)
 {
 	struct sst_data *drv;
 	int ret;
-	struct sst_platform_data *pdata = pdev->dev.platform_data;
+	struct sst_platform_data *pdata;
 
 	drv = devm_kzalloc(&pdev->dev, sizeof(*drv), GFP_KERNEL);
 	if (drv == NULL) {
@@ -578,6 +578,12 @@ static int sst_platform_probe(struct platform_device *pdev)
 		return -ENOMEM;
 	}
 
+	pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
+	if (pdata == NULL) {
+		pr_err("kzalloc failed for pdata\n");
+		return -ENOMEM;
+	}
+
 	pdata->pdev_strm_map = dpcm_strm_map;
 	pdata->strm_map_size = ARRAY_SIZE(dpcm_strm_map);
 	drv->pdata = pdata;