ASoC: Intel: sof_rt5682: Modify number of HDMI to 3 for MTL/Rex devices

For all MTL/Rex devices, number of HDMI supported is 3.

Signed-off-by: Yong Zhi <yong.zhi@intel.com>
Signed-off-by: Uday M Bhat <uday.m.bhat@intel.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Link: https://lore.kernel.org/r/20230915124852.1696857-10-yung-chuan.liao@linux.intel.com


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