Change in coreboot[master]: soc/intel/elkhartlake: Add PSE TSN support

[Lean Sheng Tan (Code Review)]

Attention is currently required from: Maulik V Vaghela, Paul Menzel, Mario Scheithauer, Angel Pons, Werner Zeh, Patrick Rudolph.
Lean Sheng Tan has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/56633 )

Change subject: soc/intel/elkhartlake: Add PSE TSN support
......................................................................

Patch Set 25:

(2 comments)

Commit Message:

https://review.coreboot.org/c/coreboot/+/56633/comment/4146d61f_b53ca8bc 
PS1, Line 8:
> IIRC, TSN = Time Sensitive Networking. […]

Yes, i just removed WIP. Updated.

File src/soc/intel/elkhartlake/fsp_params.c:

https://review.coreboot.org/c/coreboot/+/56633/comment/689dfbf6_e5409f18 
PS19, Line 143: params->PchPseGbeEnable[0] = is_devfn_enabled(PCH_DEVFN_GBE) ?
              : 			Host_Owned : config->PseGbeOwn;
> This statement is identical to the statement above. […]

Yeah it was WIP. Updated now, please take a look :)