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

[Arthur Heymans (Code Review)]

Attention is currently required from: Michał Żygowski, Michał Kopeć.
Arthur Heymans 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
......................................................................

Patch Set 7:

(2 comments)

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

https://review.coreboot.org/c/coreboot/+/52781/comment/9de9ef51_5ad8ee56 
PS7, Line 24: if (acpi_is_wakeup_s3()) {
            : 		restore_mtrr();
This will result in different MTRR solutions at resume.

https://review.coreboot.org/c/coreboot/+/52781/comment/2b2272ad_0b48ca3a 
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.