[U-Boot] how to get u-boot code with arm64: core support

[TigerLiu at viatech.com.cn]

Hi, experts:
I have tried to boot uefi bootloader with FVP model,it is ok!
./Foundation_v8 --cores=4 --no-secure-memory --visualization --gicv3
--data="./bl1.bin"@0x0 --data="./uefi.fd"@0x8000000

BL1-->BL2-->...>uefi.fd

But booting uboot.bin, it still failed.

Best wishes,