Address the iasl 20160108-64 (Ubuntu 16.04) warnings below.
```
Intel ACPI Component Architecture
ASL+ Optimizing Compiler version 20160108-64
Copyright (c) 2000 - 2016 Intel Corporation
dsdt.aml 245: Method (_CRS, 0, NotSerialized)
Remark 2120 - ^ Control Method should be made Serialized (due to creation of named objects within)
dsdt.aml 262: Method (_CRS, 0, NotSerialized)
Remark 2120 - ^ Control Method should be made Serialized (due to creation of named objects within)
dsdt.aml 277: Method (_CRS, 0, NotSerialized)
Remark 2120 - ^ Control Method should be made Serialized (due to creation of named objects within)
dsdt.aml 295: Method(_CRS, 0) {
Remark 2120 - ^ Control Method should be made Serialized (due to creation of named objects within)
```
BUG=none
BRANCH=none
TEST=none
Change-Id: Ic33a018d9dc9b9acec079499684401da17177681
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: d4f92fa603
Original-Change-Id: Id5b0f33fba8ea25e4a6aa4f01c69a69aaf5aef23
Original-Signed-off-by: Paul Menzel <pmenzel@molgen.mpg.de>
Original-Reviewed-on: https://review.coreboot.org/18323
Original-Tested-by: build bot (Jenkins)
Original-Reviewed-by: Tobias Diedrich <ranma+coreboot@tdiedrich.de>
Original-Reviewed-by: Martin Roth <martinroth@google.com>
Reviewed-on: https://chromium-review.googlesource.com/452892
0e6f3b862c