ASoC: tegra: use DAI's not card's dev for dev_err

This is the actual device of the I2S or SPDIF controller reporting the
problem. If a future change converts these controllers to be CODECs, then
there may be no pcm associated with the substream, so this change avoids
a crash.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
diff --git a/sound/soc/tegra/tegra20_spdif.c b/sound/soc/tegra/tegra20_spdif.c
index ffbd99c..f774a2d 100644
--- a/sound/soc/tegra/tegra20_spdif.c
+++ b/sound/soc/tegra/tegra20_spdif.c
@@ -77,7 +77,7 @@
 				struct snd_pcm_hw_params *params,
 				struct snd_soc_dai *dai)
 {
-	struct device *dev = substream->pcm->card->dev;
+	struct device *dev = dai->dev;
 	struct tegra20_spdif *spdif = snd_soc_dai_get_drvdata(dai);
 	int ret, spdifclock;