forked from Mirrors/opensbi

We introduce nascent_init() platform callback which will allow platforms to do very early initialization of platform specific per-HART CSRs and per-HART devices. Signed-off-by: Anup Patel <anup.patel@wdc.com> Signed-off-by: Anup Patel <apatel@ventanamicro.com> Reviewed-by: Atish Patra <atishp@rivosinc.com>