[riscv-config] Fix issues in CV32A65X input spec and regenerate output.
Created by: zchamski
- Add Zba, Zbb, Zbc and Zbs extensions (FIXME: implied B not handled yet)
- Update MVENDORID
- Update MARCHID
- Fix MSTATUS legal values and MSTATUS reset value
- Remove over-specification of unimp fields of MSTATUS
- Define the reserved bits of DCACHE as read-only 0.
- Remove unnecessary quotes.
- Regenerate files under cv32a65x/generated.