video: indicate code page of bitmap fonts

Add comments clarifying that the bitmap fonts support code page 437.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
diff --git a/drivers/video/vidconsole-uclass.c b/drivers/video/vidconsole-uclass.c
index 6f3988d..5553d62 100644
--- a/drivers/video/vidconsole-uclass.c
+++ b/drivers/video/vidconsole-uclass.c
@@ -13,7 +13,7 @@
 #include <dm.h>
 #include <video.h>
 #include <video_console.h>
-#include <video_font.h>		/* Get font data, width and height */
+#include <video_font.h>		/* Bitmap font for code page 437 */
 
 /*
  * Structure to describe a console color