acpi.h: make it self contained

Headers shouldn't assume another header is included,
pull in everything necessary.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

include/hw/acpi/acpi.h

@@ -19,6 +19,12 @@
  * <http://www.gnu.org/licenses/>.
  */
 
+#include "qapi/error.h"
+#include "qemu/typedefs.h"
+#include "qemu/notify.h"
+#include "qemu/option.h"
+#include "exec/memory.h"
+
 /* from linux include/acpi/actype.h */
 /* Default ACPI register widths */