forked from Mirrors/opensbi

We now have sbi_domain_root_add_memregion() which allows platform support to add root domain regions at boot-time so let's remove the domains_root_regions() platform callback which was added for this purpose. Signed-off-by: Anup Patel <anup.patel@wdc.com> Reviewed-by: Alistair Francis <alistair.francis@wdc.com> Reviewed-by: Xiang W <wxjstz@126.com>