[M] Change in coreboot[main]: soc/intel/common/systemagent: Improve systemagent

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Hello Jérémy Compostella, Shuo Liu, build bot (Jenkins),

I'd like you to reexamine a change. Please visit

https://review.coreboot.org/c/coreboot/+/83318?usp=email

to look at the new patch set (#13).

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Verified+1 by build bot (Jenkins)

Change subject: soc/intel/common/systemagent: Improve systemagent
......................................................................

soc/intel/common/systemagent: Improve systemagent

System agent in Intel common block (1) assumes TOLUD and TOUUD
registers hold the max available address plus 1, but on some SoC like
Snow Ridge, it holds the max available address; (2) aligns TOLUD, TOUUD
and TSEG registers to 1 MiB default, but some SoC may have different
alignments. This patch add a new weak function
`soc_systemagent_fixup_address()` to improve it.

CAPID_A, BDSM and BGSM registers may not exist on specific platform,
this patch add `HAVE_CAPID_A_REGISTER` and `HAVE_BDSM_BGSM_REGISTER`
to select them.
   
Change-Id: If32c2a6524c9d55ce7f9c3dd203bcf85cab76c2c
Signed-off-by: Yuchi Chen 
---
M src/soc/intel/common/block/include/intelblocks/systemagent.h
M src/soc/intel/common/block/systemagent/Kconfig
M src/soc/intel/common/block/systemagent/systemagent.c
M src/soc/intel/common/block/systemagent/systemagent_def.h
M src/soc/intel/common/block/systemagent/systemagent_early.c
5 files changed, 56 insertions(+), 7 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/18/83318/13