Change in coreboot[master]: cpu/amd/agesa/family14/model_14_init.c: create correct MTRR solution

[Michał Kopeć (Code Review)]

Attention is currently required from: Michał Żygowski, Arthur Heymans.
Michał Kopeć has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/52781 )

Change subject: cpu/amd/agesa/family14/model_14_init.c: create correct MTRR solution
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Patch Set 12:

(2 comments)

File src/cpu/amd/agesa/family14/model_14_init.c:

https://review.coreboot.org/c/coreboot/+/52781/comment/971a5b6c_f3b7c064 
PS7, Line 24: if (acpi_is_wakeup_s3()) {
            : 		restore_mtrr();
> This will result in different MTRR solutions at resume.

It looks like the MTRRs are backed up in `BS_POST_DEVICE` (`amd_bs_post_device`), after they're initialized, so the same solution should be restored here, or am I missing something?

https://review.coreboot.org/c/coreboot/+/52781/comment/8d685da1_a4ee4c2b 
PS7, Line 32: /*
            : 		 * Enable ROM caching on BSP we just lost when creating MTRR solution, for
            : 		 * faster execution
            : 		 */
            : 		if (boot_cpu()) {
            : 			mtrr_use_temp_range(OPTIMAL_CACHE_ROM_BASE, OPTIMAL_CACHE_ROM_SIZE,
            : 					    MTRR_TYPE_WRPROT);
            : 		}
> code is not executed from ROM at this point.

Done