[XS] Change in coreboot[master]: intelblocks/pep: Restrict TBT displays(DPOF) on S0ix transition to FWCM.

[Felix Singer (Code Review)]

Attention is currently required from: Balaji Manigandan, Jamie Ryu, Subrata Banik, Tarun Tuli, Usha P, Utkarsh H Patel, Utkarsh H Patel, Vikrant Jadeja.

Felix Singer has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/75717?usp=email )

Change subject: intelblocks/pep: Restrict TBT displays(DPOF) on S0ix transition to FWCM.
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Patch Set 3:

(3 comments)

Commit Message:

https://review.coreboot.org/c/coreboot/+/75717/comment/52ff5fc5_a48d83ee :
PS3, Line 7: .
No periods in commit titles.

https://review.coreboot.org/c/coreboot/+/75717/comment/8ea58593_0cec6cb7 :
PS3, Line 9: IOM needed to be notified about DPOF(TBT Displays OFF) only when Firmware connection Manager in use during S0ix Entry/Exit.
Reflow for 72 chars per line

File src/soc/intel/common/block/acpi/pep.c:

https://review.coreboot.org/c/coreboot/+/75717/comment/b4fec88b_1272304a :
PS3, Line 278: 	#if CONFIG(FIRMWARE_CONNECTION_MANAGER)
Please don't use preprocessor ifs when possible. For cases like this, just go with C code. The compiler will remove the code in case of `if (0)`.

```
if (CONFIG(FIRMWARE_CONNECTION_MANAGER)) {
...
}
```