[M] Change in coreboot[main]: util/ifdtool: Add support for checking GPR0 status

[Tyler Wang (Code Review)]

Attention is currently required from: David Wu, Krishna P Bhat D, Reka Norman, Reka Norman, Stefan Reinauer, Subrata Banik.

Tyler Wang has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/81928?usp=email )

Change subject: util/ifdtool: Add support for checking GPR0 status
......................................................................

Patch Set 11:

(3 comments)

This change is ready for review.

Commit Message:

https://review.coreboot.org/c/coreboot/+/81928/comment/7b7cb57a_c1313100 :
PS8, Line 14: 
Done.

File util/ifdtool/ifdtool.c:

https://review.coreboot.org/c/coreboot/+/81928/comment/50496ac2_c6e0d404 :
PS7, Line 1799: reg
> nit: maybe rename this to something like `expected` to make it clearer.

Done. Rename it to `enabled_gprd`.
Thanks.

https://review.coreboot.org/c/coreboot/+/81928/comment/6ff58eba_5104dca6 :
PS7, Line 1801: 
              : 	uint32_t gpr0_range_start, gpr0_range_end;
              : 
              : 	if (calculate_gpr0_range(image, size, &gpr0_range_start, &gpr0_range_end))
              : 		exit(EXIT_FAILURE);
              : 
              : 	reg.data.start = (gpr0_range_start >> 12) & 0x7fff;
              : 	reg.data.end = (gpr0_range_end >> 12) & 0x7fff;
              : 	reg.data.read_protect_en = 0;
              : 	reg.data.write_protect_en = 1;
              :
> Can you factor this out into a helper function like get_enabled_gprd(), and use it both here and in  […]

Done. Please help to review, thanks!