Abort vminit for now

Minor hack, sorry.
diff --git a/kern/drivers/dev/vm.c b/kern/drivers/dev/vm.c
index 817e59d..a0a8bf1 100644
--- a/kern/drivers/dev/vm.c
+++ b/kern/drivers/dev/vm.c
@@ -229,6 +229,7 @@
 
 static void vminit(void)
 {
+	return;
 	print_func_entry();
 	int i;
 	spinlock_init_irqsave(&vmlock);