mainboard/lenovo/t400: Add initial ATPX ACPI implementation

Change-Id: I9b86ebec59ccb63db0e1ba61533d162507a22379
Signed-off-by: Timothy Pearson <tpearson@raptorengineeringinc.com>
Reviewed-on: http://review.coreboot.org/9320
Tested-by: build bot (Jenkins)
Tested-by: Raptor Engineering Automated Test Stand <noreply@raptorengineeringinc.com>
Reviewed-by: Edward O'Callaghan <edward.ocallaghan@koparo.com>
diff --git a/src/mainboard/lenovo/t400/dsdt.asl b/src/mainboard/lenovo/t400/dsdt.asl
index 5545c94..6274755 100644
--- a/src/mainboard/lenovo/t400/dsdt.asl
+++ b/src/mainboard/lenovo/t400/dsdt.asl
@@ -53,6 +53,9 @@
 	/* Chipset specific sleep states */
 	#include <southbridge/intel/i82801ix/acpi/sleepstates.asl>
 
+	/* Hybrid graphics support code */
+	#include "acpi/graphics.asl"
+
 	/* Dock support code */
 	#include "acpi/dock.asl"
 }