ACPICA: Revert "Headers: Deploy #pragma pack (push) and (pop)."

This reverts commit aae576e5faefa8ba70647efa320d4747b6375f1e.
Push and Pop are not portable "enough", and caused problems for
some ACPICA customers.

Signed-off-by: Robert Moore <Robert.Moore@intel.com>
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

drivers/acpi/acpica/acevents.h

@@ -44,8 +44,6 @@
 #ifndef __ACEVENTS_H__
 #define __ACEVENTS_H__
 
-#pragma pack(push)		/* Set default struct packing */
-
 /*
  * evevent
  */
@@ -253,5 +251,4 @@ u32 acpi_ev_install_sci_handler(void);
 acpi_status acpi_ev_remove_all_sci_handlers(void);
 
 ACPI_HW_DEPENDENT_RETURN_VOID(void acpi_ev_terminate(void))
-#pragma pack(pop)		/* Restore original struct packing */
 #endif				/* __ACEVENTS_H__  */