Change in coreboot[master]: src/security/vboot: Set up secure counter space in TPM NVRAM

[Karthik Ramasubramanian (Code Review)]

Attention is currently required from: Andrey Pronin, Raul Rangel, Paul Menzel, Julius Werner, Yu-Ping Wu.
Karthik Ramasubramanian has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/59476 )

Change subject: src/security/vboot: Set up secure counter space in TPM NVRAM
......................................................................

Patch Set 3:

(3 comments)

File src/security/vboot/antirollback.h:

https://review.coreboot.org/c/coreboot/+/59476/comment/2f7f66bc_fc224c92 
PS2, Line 30: #define HASH_NV_SIZE                    VB2_SHA256_DIGEST_SIZE
> I would insert them here so the spaces are listed in ascending order. […]

Done

https://review.coreboot.org/c/coreboot/+/59476/comment/c7e28066_2fe074db 
PS2, Line 42: #define SECURE_COUNTER4_NV_INDEX	0x1012
> right, but the indexes of the counters are cr50 specific. […]

I have made references to use-case here(Widevine) so that it is more clear.

File src/security/vboot/secure_counter.h:

https://review.coreboot.org/c/coreboot/+/59476/comment/de8222c9_930790b3 
PS1, Line 14: 	SECURE_COUNTER4_NV_INDEX,		/* 0x1012 */
> No, I think the counters should be specifically named after their purpose. […]

Ack. Rephrased the kconfig item, macros etc. to make it clear that this is specific to Widevine Counters.