ASoC: Intel: sof_cs42l42: add mtl_cs42l42_def for mtl boards

Add the board config mtl_cs42l42_def to cs42l42 machine driver for all
mtl boards using default SSP port allocation (headphone codec on SSP2,
speaker amplifiers on SSP0, and BT offload on SSP1).

Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Signed-off-by: Brent Lu <brent.lu@intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://msgid.link/r/20240327162408.63953-19-pierre-louis.bossart@linux.intel.com


Signed-off-by: Mark Brown <broonie@kernel.org>