ASoC: samsung: pcm: fix kernel-doc

Fix W=1 warnings - missing fields in structure

Credits to Sylwester Nawrocki for the pclk and cclk descriptions.
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Link: https://lore.kernel.org/r/20200707190612.97799-4-pierre-louis.bossart@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/samsung/pcm.c

@@ -104,8 +104,13 @@
 
 /**
  * struct s3c_pcm_info - S3C PCM Controller information
+ * @lock: Spin lock
  * @dev: The parent device passed to use from the probe.
  * @regs: The pointer to the device register block.
+ * @sclk_per_fs: number of sclk per frame sync
+ * @idleclk: Whether to keep PCMSCLK enabled even when idle (no active xfer)
+ * @pclk: the PCLK_PCM (pcm) clock pointer
+ * @cclk: the SCLK_AUDIO (audio-bus) clock pointer
  * @dma_playback: DMA information for playback channel.
  * @dma_capture: DMA information for capture channel.
  */