Add DTB boot support, only support LS2K1000 processor for now,Tested-by: Ming Wang <wangming01@xxxxxxxxxxx>
determine whether to use the built-in DTB or the DTB from the
firmware by checking the range of CKSEG0 and XKPHYS.loongson_fw
_interface will be used in the future.
Signed-off-by: Jiaxun Yang <jiaxun.yang@xxxxxxxxxxx>
Signed-off-by: Qing Zhang <zhangqing@xxxxxxxxxxx>