Fix build with host installed libfdt headers#2

baruchsiach wants to merge 5 commits intoSolidRun:v2018.01-solidrun-a38xSolidRun/u-boot:v2018.01-solidrun-a38xfrom

baruchsiach:v2018.01-solidrun-a38x-build-fixesbaruchsiach/u-boot:v2018.01-solidrun-a38x-build-fixesCopy head branch name to clipboard