forked from Mirrors/opensbi

If ISA extension Zkr is available, set mseccfg.sseed=1 mseccfg.useed=0 This enables access to the seed CSR in S-mode but not in U-mode. Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com> Reviewed-by: Anup Patel <anup@brainfault.org>