- Disable original vop_strategy lock specification.

- Switch to the new vop_strategy_pre for lock validation.

VOP_STRATEGY requires only that the buf is locked UNLESS the block numbers need
to be translated.  There may be other reasons, but as long as the underlying
layer uses a VOP to perform the operations they will be caught later.

sys/kern/vnode_if.src

@@ -387,7 +387,8 @@ vop_bmap {
 };
 
 #
-#% strategy	vp	L L L
+# strategy	vp	L L L
+#! strategy	pre	vop_strategy_pre
 #
 vop_strategy {
 	IN struct vnode *vp;