[XL] Change in coreboot[master]: Revert "mb/aopen/dxplplusu: Remove board"

[Kyösti Mälkki (Code Review)]

Attention is currently required from: Angel Pons, Arthur Heymans, Elyes Haouas, Felix Held.

Kyösti Mälkki has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/69339 )

Change subject: Revert "mb/aopen/dxplplusu: Remove board"
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Patch Set 3:

(1 comment)

File src/cpu/intel/model_f2x/model_f2x_init.c:

https://review.coreboot.org/c/coreboot/+/69339/comment/05ba2083_3149977b 
PS2, Line 17: if (!intel_ht_sibling()) {
            : 		/* MTRRs are shared between threads */
            : 		x86_setup_mtrrs();
            : 		x86_mtrr_check();
            : 
            : 		/* Update the microcode */
            : 		intel_update_microcode_from_cbfs();
            : 	}
            : 
            : 	/* Start up my CPU siblings */
            : 	intel_sibling_init(cpu);
> This can be dropped if mp_ops has […]

Done but not tested