ACPICA: Support for custom ACPICA build for ACPI 5 reduced hardware

Add ACPI_REDUCED_HARDWARE flag that removes all hardware-related
code (about 10% code, 5% static data).

Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Lin Ming <ming.m.lin@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>

drivers/acpi/acpica/evgpeinit.c

@@ -48,7 +48,7 @@
 
 #define _COMPONENT          ACPI_EVENTS
 ACPI_MODULE_NAME("evgpeinit")
-
+#if (!ACPI_REDUCED_HARDWARE)	/* Entire module */
 /*
  * Note: History of _PRW support in ACPICA
  *
@@ -440,3 +440,5 @@ acpi_ev_match_gpe_method(acpi_handle obj_handle,
 			  name, gpe_number));
 	return_ACPI_STATUS(AE_OK);
 }
+
+#endif				/* !ACPI_REDUCED_HARDWARE */