ASoC: mop500_ab8500: Replace instances of rtd->codec->card with rtd->card

No need to go via the CODEC to get a pointer to the card. This will help to
eventually remove the card field from the snd_soc_codec struct.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Mark Brown <broonie@linaro.org>
diff --git a/sound/soc/ux500/mop500_ab8500.c b/sound/soc/ux500/mop500_ab8500.c
index 7e923ec..be4f1ac7 100644
--- a/sound/soc/ux500/mop500_ab8500.c
+++ b/sound/soc/ux500/mop500_ab8500.c
@@ -411,7 +411,7 @@
 	drvdata->mclk_sel = MCLK_ULPCLK;
 
 	/* Add controls */
-	ret = snd_soc_add_card_controls(codec->card, mop500_ab8500_ctrls,
+	ret = snd_soc_add_card_controls(rtd->card, mop500_ab8500_ctrls,
 			ARRAY_SIZE(mop500_ab8500_ctrls));
 	if (ret < 0) {
 		pr_err("%s: Failed to add machine-controls (%d)!\n",