x86: Allow compiling out realmode/bios code

We don't want this for coreboot, so provide a way of compiling it out.

Signed-off-by: Gabe Black <gabeblack@chromium.org>
Signed-off-by: Stefan Reinauer <reinauer@chromium.org>
Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/x86/lib/video.c b/arch/x86/lib/video.c
index 3d6b24d..20e2416 100644
--- a/arch/x86/lib/video.c
+++ b/arch/x86/lib/video.c
@@ -222,8 +222,10 @@
 
 int drv_video_init(void)
 {
+#ifndef CONFIG_X86_NO_REAL_MODE
 	if (video_bios_init())
 		return 1;
+#endif
 
 	return video_init();
 }