[M] Change in coreboot[main]: [TEST ONLY] add VPRO features control by fw config

[Wonkyu Kim (Code Review)]

Attention is currently required from: Kapil Porwal, Subrata Banik, Tarun Tuli, Wonkyu Kim.

Hello Kapil Porwal, Subrata Banik, Tarun Tuli, build bot (Jenkins),

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

https://review.coreboot.org/c/coreboot/+/75714?usp=email

to look at the new patch set (#3).

Change subject: [TEST ONLY] add VPRO features control by fw config
......................................................................

[TEST ONLY] add VPRO features control by fw config

Define keylocker, tme fw_config bits(24-25)
field KEYLOCKER 24
    option KEYLOCKER_EN		0
    option KEYLOCKER_DIS		1
end
field TME 25
    option TME_EN			0
    option TME_DIS			1
end

Vpro features Disable: 3XXXXXX (XXXXXX is existing fw_config value)
Vpro features Enable :  XXXXXX (XXXXXX is existing fw_config value)

ex)proto1 SKU1 fw_config: 0x1561
0x1561 => Vpro features(keylocker/tme) are enabled
0x3001561 => Vpro features(keylocker/tme) are disabled

localhost ~ # cbmem -c | grep fw_config
...
[DEBUG]  keylocker is disabled by fw_config
...
[DEBUG]  TME is disabled by fw config

How to read FW config
From EC console, type "cbi" to read FW config
ex)
23-05-17 23:33:33.229 ec:~$ cbi
...
23-05-17 23:41:33.248 FW_CONFIG: 5473 (0x1561)
...

How to write FW config
From EC consone, type "cbi set 6 <FW config value> 4
ex)
23-05-17 23:43:42.320 ec:~$ cbi set 6 0x3001561 4

Signed-off-by: Wonkyu Kim 
Change-Id: I746ba80279dc69d06ac9e06bfeae068e31d23694
---
M src/cpu/intel/common/common_init.c
M src/mainboard/google/rex/variants/rex0/Makefile.inc
A src/mainboard/google/rex/variants/rex0/cpulib.c
M src/mainboard/google/rex/variants/rex0/overridetree.cb
M src/soc/intel/common/block/cpu/cpulib.c
M src/soc/intel/common/block/include/intelblocks/cpulib.h
6 files changed, 74 insertions(+), 2 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/14/75714/3