forked from Mirrors/opensbi

The RISC-V convention for the privilege mode is capital letter, like 'M-mode', instead of 'm-mode'. Signed-off-by: Bin Meng <bmeng@tinylab.org> Reviewed-by: Atish Patra <atishp@rivosinc.com> Reviewed-by: Anup Patel <anup@brainfault.org>