Kernel: Fix HPET interrupt routing

If the HPET did not support legacy routing we would still use IRQ0 which
lead to using PIT irq which fired ~18 times per second

kernel/kernel/kernel.cpp

@@ -151,7 +151,7 @@ extern "C" void kernel_main(uint32_t boot_magic, uint32_t boot_info)
 	InterruptController::initialize(cmdline.force_pic);
 	dprintln("Interrupt controller initialized");
 
-	SystemTimer::initialize(cmdline.force_pic);
+	SystemTimer::initialize();
 	dprintln("Timers initialized");
 
 	DevFileSystem::initialize();