[U-Boot] bug regarding ext4 filesystem

Hi ,

Ext4load command fail to load large file.

S3 # ext4load mmc 0:1 0x6000000 system.img

invalid extent block

** Unable to read file system.img **

S3 # ext4ls mmc 0:1

<DIR> 4096 .

<DIR> 4096 ..

1015 boot_script.uimg

4314 data.img

177477960 system.img

238604 u-boot-bret.bin

3260352 uImage

<DIR> 4096 32.00.12-NAND

706 .ash_history

<DIR> 4096 32.00.12-NoneNAND.bak