With your full nand dump, I got the same "bad result" as mine before. :p
(I use a new nand chip with 0 bad block.)
NAND ECC BCH-8, page size 0x800 bytes, spare size used 108 bytes
NAND flash device: , id 0xc2da block 128KB size 262144KB
...
nand: device found, Manufacturer ID: 0xc2, Chip ID...