ASoC: rt-sdw-common: fix rt_sdca_index_update_bits function parameter description

ASoC: rt-sdw-common: fix rt_sdca_index_update_bits function parameter description

Fix the mismatch between function parameter and description.
Below warning are reported with W=1.
warning: Function parameter or struct member 'val' not described in
'rt_sdca_index_update_bits'
warning: Excess function parameter 'value' description in
'rt_sdca_index_update_bits'

Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Reviewed-by: Shuming Fan <shumingf@realtek.com>
Link: https://patch.msgid.link/20241024060205.20201-1-yung-chuan.liao@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>