forked from Mirrors/opensbi

The original sbi_ipi will be processed by hart by hart, after optimization, send ipi first and finally wait together. Signed-off-by: Xiang W <wxjstz@126.com> Reviewed-by: Anup Patel <anup@brainfault.org> Tested-by: Anup Patel <anup@brainfault.org>