Remove some timer.h-related include hacks

Author: Cacodemon345

src/qt/qt_machinestatus.cpp

@@ -19,9 +19,6 @@
 #include "qt_machinestatus.hpp"
 
 extern "C" {
-#define EMU_CPU_H // superhack - don't want timer.h to include cpu.h here, and some combo is preventing a compile
-extern uint64_t tsc;
-
 #include <86box/hdd.h>
 #include <86box/timer.h>
 #include <86box/86box.h>

src/qt/qt_mainwindow.cpp

@@ -48,11 +48,10 @@ extern "C" {
 #include <86box/machine.h>
 #include <86box/vid_ega.h>
 #include <86box/version.h>
-#if 0
-#include <86box/acpi.h> /* Requires timer.h include, which conflicts with Qt headers */
-#endif
-extern atomic_int acpi_pwrbut_pressed;
-extern int acpi_enabled;
+#include <86box/timer.h>
+#include <86box/apm.h>
+#include <86box/nvr.h>
+#include <86box/acpi.h>
 
 #ifdef USE_VNC
 #    include <86box/vnc.h>