mb/t400/acpi: Update ATPR buffer to fit all entries

Error spotted using acpica version 20190509 (Change-Id: I6779a20).

Change-Id: Ic9cf16a7494667f6dab156c697fb8f8e9966051e
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/32743
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>
Reviewed-by: Martin Roth <martinroth@google.com>
diff --git a/src/mainboard/lenovo/t400/acpi/graphics.asl b/src/mainboard/lenovo/t400/acpi/graphics.asl
index 818ea93..038774f 100644
--- a/src/mainboard/lenovo/t400/acpi/graphics.asl
+++ b/src/mainboard/lenovo/t400/acpi/graphics.asl
@@ -63,9 +63,7 @@
 	})
 	CreateWordField (ATPR, 0x00, SIZE)
 	CreateWordField (ATPR, 0x02, VERS)
-	CreateDWordField (ATPR, 0x02, MASK)
 	CreateDWordField (ATPR, 0x04, FUNC)
-	CreateDWordField (ATPR, 0x06, FLAG)
 
 	/* Version request */
 	if (LEqual(Arg0, 0x0))