Implement KeInitializeSpinLock() routine

sdk/xtdk/kefuncs.h

@@ -16,6 +16,10 @@
 
 
 /* Kernel services routines forward references */
+XTAPI
+VOID
+KeInitializeSpinLock(IN PKSPIN_LOCK SpinLock);
+
 XTAPI
 VOID
 KeInitializeTimer(OUT PKTIMER Timer);