tty: vt, make color_table const

This means all ->con_set_palette have to have the second parameter
const too now.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/include/linux/selection.h b/include/linux/selection.h
index 85193aa..7e6c445 100644
--- a/include/linux/selection.h
+++ b/include/linux/selection.h
@@ -24,7 +24,7 @@
 
 extern int console_blanked;
 
-extern unsigned char color_table[];
+extern const unsigned char color_table[];
 extern int default_red[];
 extern int default_grn[];
 extern int default_blu[];