ACPICA: Prefer ACPI_TO_POINTER() over ACPI_ADD_PTR()

This is more easy to read.
Signed-off-by: NJung-uk Kim <jkim@free_BSD.org>
Signed-off-by: NErik Schmauss <erik.schmauss@intel.com>
Signed-off-by: NRafael J. Wysocki <rafael.j.wysocki@intel.com>

include/acpi/actypes.h

@@ -485,7 +485,7 @@ typedef u8 acpi_owner_id;
 /*
  * Constants with special meanings
  */
-#define ACPI_ROOT_OBJECT                ACPI_ADD_PTR (acpi_handle, (void *) 0, ACPI_MAX_PTR)
+#define ACPI_ROOT_OBJECT                ((acpi_handle) ACPI_TO_POINTER (ACPI_MAX_PTR))
 #define ACPI_WAIT_FOREVER               0xFFFF	/* u16, as per ACPI spec */
 #define ACPI_DO_NOT_WAIT                0