ASoC: omap: Add .owner to struct snd_soc_card

Missed .owner of struct snd_soc_card will prevent the module from being
removed from underneath its users.

Reported-by: Lothar Waßmann <LW@KARO-electronics.de>
Signed-off-by: Axel Lin <axel.lin@gmail.com>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Liam Girdwood <lrg@ti.com>
diff --git a/sound/soc/omap/rx51.c b/sound/soc/omap/rx51.c
index ad16db5..fada6ef 100644
--- a/sound/soc/omap/rx51.c
+++ b/sound/soc/omap/rx51.c
@@ -383,6 +383,7 @@
 /* Audio card */
 static struct snd_soc_card rx51_sound_card = {
 	.name = "RX-51",
+	.owner = THIS_MODULE,
 	.dai_link = rx51_dai,
 	.num_links = ARRAY_SIZE(rx51_dai),
 	.aux_dev = rx51_aux_dev,