Change in coreboot[master]: soc/intel/common/{sa, adl}: Add `finalize` operation for systemagent

[Tim Wawrzynczak (Code Review)]

Attention is currently required from: Subrata Banik, Nick Vaccaro, Angel Pons, Arthur Heymans, Lean Sheng Tan, Eric Lai.
Tim Wawrzynczak has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/63518 )

Change subject: soc/intel/common/{sa, adl}: Add `finalize` operation for systemagent
......................................................................

Patch Set 2:

(1 comment)

File src/soc/intel/common/block/systemagent/systemagent.c:

https://review.coreboot.org/c/coreboot/+/63518/comment/82e9922e_ce137fd5 
PS2, Line 337: skip         = CONFIG(USE_FSP_NOTIFY_PHASE_END_OF_FIRMWARE),
is it harmful to attempt to lock the PAM registers twice? i.e., does this need to be skipped only if the Kconfig is true or can we always send it? i.e., sa_final() would just be set to e.g.

```
static void systemagent_final(struct device *dev)
{
        sa_lock_pam();
}
```

also are there more steps to come here later?