[U-Boot] NAND DMA timed out with i.mx boot source code.

Hi: I have one board which hardware copied from mx28evk board, and compiled the source code cloned from u-boot mainline git. The rom in mx28 print 0x80508008, that is "NAND DMA timed out". I compile the source from u-boot-testing, and it's no any wrong print, and the start is OK. I don't know why result in this issue.

Best Regards, Alex