Move the BGRT image to use the same video_image linker-list approach as the other embedded image. Move it into the drivers/video/images directory and rename it to 'bgrt.bmp' since we know it is an image. Drop the old bgrt Makefile rule as it is no-longer needed. Co-developed-by: Claude <noreply@anthropic.com> Signed-off-by: Simon Glass <sjg@chromium.org>