Change in coreboot[master]: soc/intel/alderlake: mb/intel/sm: Add tcss code

[Deepti Deshatty (Code Review)]

Attention is currently required from: Maulik V Vaghela.
Deepti Deshatty has removed Tim Wawrzynczak from this change.  ( https://review.coreboot.org/c/coreboot/+/54005 )

Change subject: soc/intel/alderlake: mb/intel/sm: Add tcss code
......................................................................

Removed reviewer Tim Wawrzynczak.