Add the helpers to build up the cache hierarchy via FDT and provide some
cmo functions for the user who want to flush the entire cache.
Signed-off-by: Nick Hu <nick.hu@sifive.com>
Reviewed-by: Samuel Holland <samuel.holland@sifive.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
Link: https://lore.kernel.org/r/20251020-cache-upstream-v7-4-69a132447d8a@sifive.com
Signed-off-by: Anup Patel <anup@brainfault.org>
