forked from Mirrors/opensbi

Add BIT_ULL and GENMASK_ULL for dealing with 64-bits data on 32-bits CPU, then we don't need to separate the operation to low part and high part. For instance, the MMIO register is 64 bits wide. Signed-off-by: Zong Li <zong.li@sifive.com> Reviewed-by: Anup Patel <anup@brainfault.org>