Please refer to the attached u-boot.bin image which I got from QorIQ SDK 2.0 release.
u-boot on the current bank of NOR flash is at 0xeff40000, on the alternate bank of NOR flash is at 0xebf40000.
You could program u-boot image to the alternate bank at bank0 with the following u-boot commands.
=>tftp 1000000 u-boot.bin
=>protect off 0xebf40000 +$filesize
=>erase 0xebf40000 +$filesize
=>cp.b 1000000 0xebf40000 $filesize
=>protect on 0xebf40000 +$filesize
=>cpld reset altbank