update u-boot,linux kernel to compile dtb and zImage into single idb file; ...

guowenxue

2019-08-23 9393cb81acc34d1bd27cc921d8d98e618fb74662

linux-bsp/tarballs/linux-at91.tar.xz does not exist in tree 3faaad6cd0f108f36edcf9be7b93079f5a5b8cff