ASoC: tas2781: Add null check for calibration data

For avoid null pointer problem if no calibration data exist.

Fixes: 55137f5 ("ASoC: tas2781: Put three different calibrated data solution into the same data structure")

Signed-off-by: Baojun Xu <baojun.xu@ti.com>
Link: https://patch.msgid.link/20260319090747.2090-1-baojun.xu@ti.com
Signed-off-by: Mark Brown <broonie@kernel.org>

Author: jimxbj-dot

sound/soc/codecs/tas2781-fmwlib.c

@@ -2550,6 +2550,9 @@ static void tasdev_load_calibrated_data(struct tasdevice_priv *priv, int i)
 	int k = i * (cali_data->cali_dat_sz_per_dev + 1);
 	int rc;
 
+	if (!data || !cali_data->total_sz)
+		return;
+
 	if (data[k] != i) {
 		dev_err(priv->dev, "%s: no cal-data for dev %d from usr-spc\n",
 			__func__, i);