rk886: Add ACPI support for LID switch

Change-Id: Ib5a34491531228db9a9232322bd573fded27ee67
Signed-off-by: Patrick Georgi <patrick.georgi@secunet.com>
Reviewed-on: http://review.coreboot.org/924
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>

src/mainboard/roda/rk886ex/acpi/mainboard.asl

@@ -24,7 +24,7 @@ Device (LID0)
 	Name(_HID, EisaId("PNP0C0D"))
 	Method(_LID, 0)
 	{
-		Return (1)
+		Return (\_SB.PCI0.LPCB.EC0.P61S)
 	}
 }