dm: video: fix test failures with enabled default TrueType font

With enabled default Nimbus font dm_test_video_truetype* tests fail.
Update expected expressions to fix them.

Signed-off-by: Anatolij Gustschin <agust@denx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/test/dm/video.c b/test/dm/video.c
index 5d1faac..6be5def 100644
--- a/test/dm/video.c
+++ b/test/dm/video.c
@@ -335,7 +335,7 @@
 	ut_assertok(uclass_get_device(UCLASS_VIDEO, 0, &dev));
 	ut_assertok(uclass_get_device(UCLASS_VIDEO_CONSOLE, 0, &con));
 	vidconsole_put_string(con, test_string);
-	ut_asserteq(12619, compress_frame_buffer(dev));
+	ut_asserteq(12237, compress_frame_buffer(dev));
 
 	return 0;
 }
@@ -356,7 +356,7 @@
 	ut_assertok(uclass_get_device(UCLASS_VIDEO, 0, &dev));
 	ut_assertok(uclass_get_device(UCLASS_VIDEO_CONSOLE, 0, &con));
 	vidconsole_put_string(con, test_string);
-	ut_asserteq(33849, compress_frame_buffer(dev));
+	ut_asserteq(35030, compress_frame_buffer(dev));
 
 	return 0;
 }
@@ -377,7 +377,7 @@
 	ut_assertok(uclass_get_device(UCLASS_VIDEO, 0, &dev));
 	ut_assertok(uclass_get_device(UCLASS_VIDEO_CONSOLE, 0, &con));
 	vidconsole_put_string(con, test_string);
-	ut_asserteq(34871, compress_frame_buffer(dev));
+	ut_asserteq(29018, compress_frame_buffer(dev));
 
 	return 0;
 }