[S] Change in coreboot[master]: cpu/x86/mtrr: use lapicid instead of cpu_index calls

[Felix Held (Code Review)]

Attention is currently required from: Fred Reitberger.

Felix Held has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/70797 )

Change subject: cpu/x86/mtrr: use lapicid instead of cpu_index calls
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Patch Set 1:

(1 comment)

File src/cpu/x86/mtrr/mtrr.c:

https://review.coreboot.org/c/coreboot/+/70797/comment/5517daa2_068588bf 
PS1, Line 295: 	unsigned int cpu_idx = lapicid();
> nit: I know this was asked for in the original patch, but it is only used one more time in this func […]

it's used in a loop, so every loop iteration would do the call. since the result will be the same every time, it makes sense to me to only do the call once and then use the result from the local variable