forked from Mirrors/opensbi

Since pmp entries have implicit priority on index, previous entries will deny access to SU on M-mode region. Also, M-mode will not have access to SU region while previous entries will allow access to M-mode regions. Signed-off-by: Himanshu Chauhan <hchauhan@ventanamicro.com> Reviewed-by: Anup Patel <anup@brainfault.org>