Update to latest CLIC spec (Version 0.9-draft, 4/11/2023)
Created by: silabs-oysteink
- Removed alignment check from IF stage
- Removed exception code 0 (instruction address misaligned)
- Clearing mintthresh on mret into lower privilege
- Clearing mintthresh on dret into user mode
- Enforcing XLEN/8 alignment on pointer address when performing mret when mcause.minhv==1