Implement HlClearApicErrors() and HlSendEoi() routines, change HlDisableLegacyPic() calling convention

xtoskrnl/ke/i686/krnlinit.c

@@ -71,7 +71,7 @@ KepInitializeMachine(VOID)
     HlIoPortOutByte(0x3F6, 0);
 
 	/* Disable the legacy PIC */
-    HlDisablePic();
+    HlDisableLegacyPic();
 
     /* Initialize frame buffer */
     HlInitializeFrameBuffer();