Zcb support needed in Sail

[davidharrishmc]

gcc 13.2.0 now seems to support Zcb.

However, Sail does not yet seem to support it. Running riscof on c.mul fails, hanging with an infinite trap loop.

more ../tests/riscof/riscof_work/rv32i_m/C/src/cmul-01.S/ref/cmul-01.log
[78] [M]: 0x80000122 (0x6605) c.lui a2, 1
x12 <- 0x00001000
mem[X,0x80000124] -> 0x9E49
[79] [M]: 0x80000124 (0x9E49) c.illegal 40521
trapping from M to M to handle illegal-instruction

Here is a pending PR for Zcb into Sail.
riscv/sail-riscv#322
riscv-non-isa/riscv-arch-test#418

Adding Zcb to Wally will inolve chanigng spike_rv{32/64}gc_isa.yaml, and regression-wally to have Zcb.
ISA: RV32IMAFDCZicsr_Zicond_Zifencei_Zfa_Zfh_Zca_Zcb_Zba_Zbb_Zbc_Zbkb_Zbkc_Zbkx_Zbs_Zknd_Zkne_Zknh

[jordancarlin]

Zcb support was merged into Sail today: riscv/sail-riscv/pull/427

[davidharrishmc]

Completed with PR 747