dm: video: Add driver-model support to vesa graphics

Provide a function to run the Vesa BIOS for a given PCI device and obtain
the resulting configuration (e.g. display size) for use by the video
uclass. This makes it easier to write a video driver that uses vesa and
supports driver model.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>

include/vbe.h

@@ -106,5 +106,7 @@ extern struct vbe_mode_info mode_info;
 
 struct graphic_device;
 int vbe_get_video_info(struct graphic_device *gdev);
+struct video_priv;
+int vbe_setup_video(struct udevice *dev, int (*int15_handler)(void));
 
 #endif