The uImage compress type not supported

Hello,

I am trying to build kernel image in LEDE for Atmel at91 SAMA5D3 platforms and the compressed type is XZ. Once uImage is successfully, I transferred this image to my SD card and tried to boot up with it. However, the boot up is always failed with following message:

Booting uImage ......
The uImage compress type not supported
SD/MMC: Failed to load image

I tried with some other's image and that will work well so I am not sure if there is any kernel config I also need to enable or disable.

Could anyone help with this? Many thanks!