forked from Mirrors/opensbi

We add fdt_parse_max_hart_id() API which return max HART id based on CPU DT nodes. This will be used by generic FDT based drivers in subsequent patches. Signed-off-by: Anup Patel <anup.patel@wdc.com> Reviewed-by: Atish Patra <atish.patra@wdc.com> Reviewed-by: Alistair Francis <alistair.francis@wdc.com>