ASoC: Fix snd_soc_kcontrol_platform() return type

This should obviously be snd_soc_platform * and not snd_soc_codec *

Fixes: f6272ff8a5f4 ("ASoC: Add snd_soc_kcontrol_platform() helper function")
Reported-by: kbuild test robot <fengguang.wu@intel.com>
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Mark Brown <broonie@linaro.org>
diff --git a/include/sound/soc.h b/include/sound/soc.h
index 94a2dc2..81454b0 100644
--- a/include/sound/soc.h
+++ b/include/sound/soc.h
@@ -1253,7 +1253,7 @@
  * registered with snd_soc_add_platform_controls() or via table based setup of
  * a snd_soc_platform_driver. Otherwise the behavior is undefined.
  */
-static inline struct snd_soc_codec *snd_soc_kcontrol_platform(
+static inline struct snd_soc_platform *snd_soc_kcontrol_platform(
 	struct snd_kcontrol *kcontrol)
 {
 	return snd_kcontrol_chip(kcontrol);