ASoC: intel: sof_sdw: Make find_codec_info_dai() return a pointer

ASoC: intel: sof_sdw: Make find_codec_info_dai() return a pointer

Rather than returning an index simply return a pointer to the
located codec info, this simplifies all the callers which only
want to access the codec info structure. Also remove the inline
specifier the function is fairly large for an inline function,
let the compiler decide. And move the function such that it is
located with the other find_codec_info_*() functions.

Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://msgid.link/r/20240326160429.13560-4-pierre-louis.bossart@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>