tree 1a8e6acd3756855a9b5457edeaec83743b0cf4f5
parent 15d0e092a3f9a4e91f95681436305607f4ac3908
author Scott Mertz <scott@cyngn.com> 1449619975 -0800
committer Jackeagle <jackeagle102@gmail.com> 1527048798 -0400

dtbtool: Recursively search input directory for dtb files

On some kernels (msm8916), the build creates an empty subdirectory
in the dtb output directory.

arch/arm64/boot/dts <-- dtb location
arch/arm64/boot/dts/qcom <-- empty directory

The dt_image.mk will find the first directory which exists in its
predefined list of directories.  The empty directory then causes
no dtb files to be found.

Rather than try to specify the correct directory, make dtbtool smart
enough to traverse into subdirectories and find all dtb files. An
accompanying change to dt_image.mk is required to only search the
most generic path.

Change-Id: I56e7344c5c6d1e6a56d939cf8aaf3da9f1e6a714