fwts:rsdp_sbbr fail due to rsdt!=0

[WangYin3]

RSDP @ bff012ac (36 bytes) (generated by fwts)

[000h 0000 8] Signature : "RSD PTR "
[008h 0008 1] Checksum : 5e
[009h 0009 6] Oem ID : "FWTSID"
[00fh 0015 1] Revision : 02
[010h 0016 4] RSDT Address : bff011f0《《《《《
[014h 0020 4] Table Length : 00000024
[018h 0024 8] XSDT Address : 00000000bff01240
[020h 0032 1] Extended Checksum : db
[021h 0033 3] Reserved : 00 00 00