Unmap the valkyrie register space when we're finished with it in

the match function.  It's not like we can save that state for later,
and we don't use it anyway.

sys/arch/mac68k/obio/grf_obio.c

@@ -1,4 +1,4 @@
-/*	$NetBSD: grf_obio.c,v 1.46 2000/12/04 06:23:36 scottr Exp $	*/
+/*	$NetBSD: grf_obio.c,v 1.47 2000/12/04 06:25:19 scottr Exp $	*/
 
 /*
  * Copyright (C) 1998 Scott Reynolds
@@ -123,6 +123,8 @@ grfiv_match(parent, cf, aux)
 			
 			/* Disable interrupts */
 			bus_space_write_1(oa->oa_tag, bsh, 0x18, 0x1);
+
+			bus_space_unmap(oa->oa_tag, bsh, 0x40);
 			break;
 		}
 		/*