Add a image_fdt suite and a check for boot_fdt_add_mem_rsv_regions. This will ensure the user is properly informed of any reservation failures. It will also validate that reservations are cleaned up correctly when switching FDTs. Signed-off-by: Randolph Sapp <rs@ti.com> Reviewed-by: Simon Glass <sjg@chromium.org> Acked-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>