DM: cleanup for header inclusions

used https://gitlab.com/esr/deheader to detect and remove unnecessary
header file inclusions

Signed-off-by: Zide Chen <zide.chen@intel.com>

devicemodel/hw/platform/acpi/acpi.c

@@ -50,7 +50,6 @@
  *         DSDT  ->   0xf2800 (variable - can go up to 0x100000)
  */
 
-#include <sys/cdefs.h>
 #include <sys/param.h>
 #include <sys/stat.h>
 #include <errno.h>
@@ -63,8 +62,6 @@
 #include <stdbool.h>
 #include <fcntl.h>
 
-#include "vmm.h"
-#include "vmmapi.h"
 #include "dm.h"
 #include "acpi.h"
 #include "pci_core.h"

devicemodel/hw/platform/acpi/acpi_pm.c

@@ -9,9 +9,7 @@
 #include <string.h>
 #include <stdbool.h>
 
-#include "vmm.h"
 #include "vmmapi.h"
-#include "dm.h"
 #include "acpi.h"
 
 static inline int get_vcpu_pm_info(struct vmctx *ctx, int vcpu_id,