ACPICA: hide private headers

Signed-off-by: Len Brown <len.brown@intel.com>
diff --git a/drivers/acpi/acpica/exregion.c b/drivers/acpi/acpica/exregion.c
index ceb269e..76ec8ff 100644
--- a/drivers/acpi/acpica/exregion.c
+++ b/drivers/acpi/acpica/exregion.c
@@ -43,8 +43,8 @@
  */
 
 #include <acpi/acpi.h>
-#include <acpi/accommon.h>
-#include <acpi/acinterp.h>
+#include "accommon.h"
+#include "acinterp.h"
 
 #define _COMPONENT          ACPI_EXECUTER
 ACPI_MODULE_NAME("exregion")