SECO JUNO (SBC-D23): Add mainline U-Boot TPL/SPL image to bootloader firmware
Currently idbloader, (combinded with ddr and miniloader binaries) used in the boot flow, is packaged from Rockchip binaries.
Add support to build tpl/u-boot-tpl.bin and spl/u-boot-spl.bin from mainline U-Boot source and to package these binaries into idbloader.img
Edited by Natalia Kovalenko