[NTOS:MM] Improve an ASSERT

ntoskrnl/mm/ARM3/virtual.c

@@ -2412,7 +2412,7 @@ MiProtectVirtualMemory(IN PEPROCESS Process,
                     MI_WRITE_INVALID_PTE(PointerPte, PteContents);
 #ifdef CONFIG_SMP
                     // FIXME: Should invalidate entry in every CPU TLB
-                    ASSERT(FALSE);
+                    ASSERT(KeNumberProcessors == 1);
 #endif
                     KeInvalidateTlbEntry(MiPteToAddress(PointerPte));