When compiling for the ASUS P8H61-M LX, IASL 20180531 emits the following remark: "Control Method should be made Serialized (due to creation of named objects within)". Making the appropriate methods Serialized eliminates these remarks. Change-Id: I8e95d9a00a629a2f904c79b78fac20810327ed37 Signed-off-by: Tristan Corrick <tristan@corrick.kiwi> Reviewed-on: https://review.coreboot.org/27796 Reviewed-by: Felix Held <felix-coreboot@felixheld.de> Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>