fbcon: Export fbcon_update_vcs

I failed to spot this while compile-testing. Oops.

Reported-by: kbuild test robot <redacted>
Fixes: 9e1467002630 ("fbcon: replace FB_EVENT_MODE_CHANGE/_ALL with direct calls")
Cc: Sam Ravnborg <redacted>
Cc: Daniel Vetter <redacted>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Daniel Thompson <redacted>
Cc: Lee Jones <redacted>
Cc: Jingoo Han <jingoohan1@gmail.com>
Cc: Bartlomiej Zolnierkiewicz <redacted>
Cc: Daniel Vetter <redacted>
Cc: Hans de Goede <redacted>
Cc: Yisheng Xie <redacted>
Cc: "Michał Mirosław" <mirq-linux@rere.qmqm.pl>
Cc: Peter Rosin <redacted>
Cc: Mikulas Patocka <mpatocka@redhat.com>
Cc: <redacted>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Cc: Geert Uytterhoeven <geert+renesas@glider.be>
Cc: Lukas Wunner <lukas@wunner.de>
Cc: <redacted>
Signed-off-by: Daniel Vetter <redacted>
---
 drivers/video/fbdev/core/fbcon.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/video/fbdev/core/fbcon.c b/drivers/video/fbdev/core/fbcon.c
index b8067e07f8a8..c9235a2f42f8 100644
--- a/drivers/video/fbdev/core/fbcon.c
+++ b/drivers/video/fbdev/core/fbcon.c

@@ -3037,6 +3037,7 @@ void fbcon_update_vcs(struct fb_info *info, bool all)
 	else
 		fbcon_modechanged(info);
 }
+EXPORT_SYMBOL(fbcon_update_vcs);
 
 int fbcon_mode_deleted(struct fb_info *info,
 		       struct fb_videomode *mode)