x86_64: init local apic on boot, or legacy pic/pit as fallback

init/main.c

@@ -20,12 +20,11 @@ void kernel_init(uintptr_t arg)
 {
 	ml_init(arg);
 
-	object_bootstrap();
-	sched_init();
-
 	printk("kernel_init() running on processor %u", this_cpu());
 
 	run_all_tests();
 
-	ml_halt_cpu();
+	while (1) {
+		ml_cpu_pause();
+	}
 }