ASoC: Fix warning caused by a typo in comments of snd_soc_add_platform()

This patch fix following warnings.
Warning(.//sound/soc/soc-core.c:2855): No description found
for parameter 'platform_drv'
Warning(.//sound/soc/soc-core.c:2855): Excess function parameter
'platform_driver' description in 'snd_soc_add_platform'

Signed-off-by: Masanari Iida <standby24x7@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/soc-core.c

@@ -2838,7 +2838,7 @@ static void snd_soc_platform_drv_remove(struct snd_soc_component *component)
  * snd_soc_add_platform - Add a platform to the ASoC core
  * @dev: The parent device for the platform
  * @platform: The platform to add
- * @platform_driver: The driver for the platform
+ * @platform_drv: The driver for the platform
  */
 int snd_soc_add_platform(struct device *dev, struct snd_soc_platform *platform,
 		const struct snd_soc_platform_driver *platform_drv)