Fixes the following W=1 kernel build warning(s):

sound/soc/codecs/rt5631.c:72: warning: Function parameter or member
'component' not described in 'rt5631_write_index'
sound/soc/codecs/rt5631.c:72: warning: Function parameter or member
'reg' not described in 'rt5631_write_index'
sound/soc/codecs/rt5631.c:72: warning: Function parameter or member
'value' not described in 'rt5631_write_index'
sound/soc/codecs/rt5631.c:82: warning: Function parameter or member
'component' not described in 'rt5631_read_index'
sound/soc/codecs/rt5631.c:82: warning: Function parameter or member
'reg' not described in 'rt5631_read_index'
sound/soc/codecs/rt5631.c:367: warning: Function parameter or member
'component' not described in 'onebit_depop_power_stage'
sound/soc/codecs/rt5631.c:405: warning: Function parameter or member
'component' not described in 'onebit_depop_mute_stage'
sound/soc/codecs/rt5631.c:443: warning: Function parameter or member
'component' not described in 'depop_seq_power_stage'
sound/soc/codecs/rt5631.c:515: warning: Function parameter or member
 'component' not described in 'depop_seq_mute_stage'
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20200709162328.259586-8-pierre-louis.bossart@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>