Basic braille screen reader support

This adds a minimalistic braille screen reader support.  This is meant to
be used by blind people e.g.  on boot failures or when / cannot be mounted
etc and thus the userland screen readers can not work.

[akpm@linux-foundation.org: fix exports]
Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
Cc: Jiri Kosina <jikos@jikos.cz>
Cc: Dmitry Torokhov <dtor@mail.ru>
Acked-by: Alan Cox <alan@redhat.com>
Cc: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/drivers/char/consolemap.c b/drivers/char/consolemap.c
index 6b104e4..4246b8e 100644
--- a/drivers/char/consolemap.c
+++ b/drivers/char/consolemap.c
@@ -277,6 +277,7 @@
 			return p->inverse_translations[m][glyph];
 	}
 }
+EXPORT_SYMBOL_GPL(inverse_translate);
 
 static void update_user_maps(void)
 {