linux-tegra: add support for device tree overlays
linux-tegra: add support for device tree overlays

* Bump SRCREV to pick up some kernel makefile fixes for
  building the dtb and dtbo files

* Add task to compile all available overlays and remove
  those that are not compatible with the target's dtb(s)

* Add KERNEL_DEVICETREE_APPLY_OVERLAYS variable to have
  one or more overlays applied at build time

Signed-off-by: Matt Madison <1fa2ef4755a9226cb9a0a4840bd89b158ac71391@madison.systems>

madisongh/meta-tegra,madisongh/meta-tegra,madisongh/meta-tegra,madisongh/meta-tegra,madisongh/meta-tegra