dm: video: support increased intensity (bold)

Support special rendition code 0 - reset attributes.
Support special rendition code 1 - increased intensity (bold).

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/test/dm/video.c b/test/dm/video.c
index d158f1f..caca496 100644
--- a/test/dm/video.c
+++ b/test/dm/video.c
@@ -186,7 +186,7 @@
 	/* test colors (30-37 fg color, 40-47 bg color) */
 	vidconsole_put_string(con, ANSI_ESC"[30;41mfoo"); /* black on red */
 	vidconsole_put_string(con, ANSI_ESC"[33;44mbar"); /* yellow on blue */
-	ut_asserteq(267, compress_frame_buffer(dev));
+	ut_asserteq(265, compress_frame_buffer(dev));
 
 	return 0;
 }