tty/vt: Makefile, add --unicode for loadkeys invocation

For a long time, we generate unicode tables using loadkeys. So fix
Makefile to use that flag too.
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Link: https://lore.kernel.org/r/20220602083128.22540-2-jslaby@suse.czSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/tty/vt/Makefile

@@ -30,6 +30,6 @@ $(obj)/defkeymap.o:  $(obj)/defkeymap.c
 ifdef GENERATE_KEYMAP
 
 $(obj)/defkeymap.c: $(obj)/%.c: $(src)/%.map
-	loadkeys --mktable $< > $@
+	loadkeys --mktable --unicode $< > $@
 
 endif