purge linux/gfp.h usage

Inline or drop usage of this header so we can drop it.

BUG=chromium:878440
TEST=build works

Change-Id: I86ef7e7c9059f518c84aa900e53e091160776f7f
Reviewed-on: https://chromium-review.googlesource.com/1194902
Commit-Ready: Mike Frysinger <vapier@chromium.org>
Tested-by: Mike Frysinger <vapier@chromium.org>
Reviewed-by: Jorge Lucangeli Obes <jorgelo@chromium.org>
3 files changed