Add missing forward declarations

sdk/xtdk/kefuncs.h

@@ -56,6 +56,18 @@ VOID
 KeInitializeTimerEx(OUT PKTIMER Timer,
                     IN KTIMER_TYPE Type);
 
+XTAPI
+VOID
+KePanic(IN ULONG Code);
+
+XTAPI
+VOID
+KePanicEx(IN ULONG Code,
+          IN ULONG_PTR Parameter1,
+          IN ULONG_PTR Parameter2,
+          IN ULONG_PTR Parameter3,
+          IN ULONG_PTR Parameter4);
+
 XTAPI
 LONG
 KeReadSemaphoreState(IN PKSEMAPHORE Semaphore);