lib: Move Chrome OS specific constants to new 'chromeos.h'

The `acpi.h` has some constants that are very Chrome OS specific and may
be needed by other non-ACPI modules, so we should move that to a new
header file 'chromeos.h'.

BUG=chromium:982692
TEST=emerge-eve mosys

Change-Id: I2370004142cc5265cd49ab3744c9d7f07bfd3cd2
Reviewed-on: https://chromium-review.googlesource.com/1697970
Tested-by: Hung-Te Lin <hungte@chromium.org>
Commit-Ready: Hung-Te Lin <hungte@chromium.org>
Legacy-Commit-Queue: Commit Bot <commit-bot@chromium.org>
Reviewed-by: Philip Chen <philipchen@chromium.org>
Reviewed-by: Furquan Shaikh <furquan@chromium.org>
3 files changed