dtbocfg: Add module package This out of tree module allows us to load DTBO files at runtime while the kernel is already booted. This gives us maximum flexibility to start with a minimal system and add components as they are needed. Tested: Ran on a real machine and loaded a device tree at runtime. Google-Bug-Id: 540953723 Change-Id: Id4654446c6ffcc82cc3c5debef358f50ef25519a Signed-off-by: William A. Kennington III <wak@google.com>