forked from Mirrors/opensbi

zicfiss and zicfilp introduces new exception (cause=18). Delegate this exception to S mode because cfi violations in U / S will be reported via this exception. Signed-off-by: Deepak Gupta <debug@rivosinc.com> Reviewed-by: Samuel Holland <samuel.holland@sifive.com> Reviewed-by: Atish Patra <atishp@rivosinc.com>