Initialize CPU power structures, idle process and idle thread

xtoskrnl/ke/globals.c

@@ -23,3 +23,6 @@ ETHREAD KeInitialThread;
 
 /* Kernel service descriptor table */
 KSERVICE_DESCRIPTOR_TABLE KeServiceDescriptorTable[KSERVICE_TABLES_COUNT];
+
+/* Kernel process list */
+LIST_ENTRY KepProcessListHead;