ASoC: intel: skylake: Drop superfluous mmap callback

skl_platform_soc_mmap() just calls the standard mmap helper, hence
it's superfluous.  Let's drop it.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Reviewed-by: Cezary Rojewski <cezary.rojewski@intel.com>
Link: https://lore.kernel.org/r/20210728141930.17740-1-tiwai@suse.deSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/intel/skylake/skl-pcm.c

@@ -1214,13 +1214,6 @@ static snd_pcm_uframes_t skl_platform_soc_pointer(
 	return bytes_to_frames(substream->runtime, pos);
 }
 
-static int skl_platform_soc_mmap(struct snd_soc_component *component,
-				 struct snd_pcm_substream *substream,
-				 struct vm_area_struct *area)
-{
-	return snd_pcm_lib_default_mmap(substream, area);
-}
-
 static u64 skl_adjust_codec_delay(struct snd_pcm_substream *substream,
 				u64 nsec)
 {
@@ -1460,7 +1453,6 @@ static const struct snd_soc_component_driver skl_component  = {
 	.trigger	= skl_platform_soc_trigger,
 	.pointer	= skl_platform_soc_pointer,
 	.get_time_info	= skl_platform_soc_get_time_info,
-	.mmap		= skl_platform_soc_mmap,
 	.pcm_construct	= skl_platform_soc_new,
 	.module_get_upon_open = 1, /* increment refcount when a pcm is opened */
 };