[M] Change in coreboot[master]: soc/intel/: Rename small and big cores references

[build bot (Jenkins) (Code Review)]

Attention is currently required from: Tarun Tuli, Subrata Banik, Kapil Porwal.

build bot (Jenkins) has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/71639 )

Change subject: soc/intel/: Rename small and big cores references
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Patch Set 1:

(1 comment)

Commit Message:

Robot Comment from checkpatch (run ID jenkins-coreboot-checkpatch-167535):
https://review.coreboot.org/c/coreboot/+/71639/comment/100cce5d_0dcdde89 
PS1, Line 8: 
'heterogenous' may be misspelled - perhaps 'heterogeneous'?