[coreboot-gerrit] Change in coreboot[master]: arch/riscv: Fix cpu capabilities detection function

[Xiang Wang (Code Review)]

Xiang Wang has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/36944 )

Change subject: arch/riscv: Fix cpu capabilities detection function
......................................................................

Patch Set 4:

I read this document and made this change. 
Reference: https://github.com/riscv/riscv-isa-manual/blob/45e063b17f98b980efe9dd8a75a49...