[ros-svn] [weiden] 14381: - added stub for PoQueueShutdownWorkItem required by XP's ntfs.sys

[weiden at svn.reactos.com]

- added stub for PoQueueShutdownWorkItem required by XP's ntfs.sys
- added stubs for KeAcquireInStackQueuedSpinLock and KeReleaseInStackQueuedSpinLock


Updated files:
trunk/reactos/hal/hal/hal.c
trunk/reactos/hal/hal/hal.def
trunk/reactos/hal/halx86/generic/spinlock.c
trunk/reactos/ntoskrnl/ntoskrnl.def
trunk/reactos/ntoskrnl/po/power.c