CHROMIUM: Revert "netlink: remove mmapped netlink support"

This reverts commit 0c0be310ba29e4a053e8aac934aebe590c5da909.

We can not remove netlink MMAP support at this time since it is enabled
by Lakitu and tested as part of its release tests.

BUG=chromium:711780
TEST=After merge, ensure that Lakitu images still work

Change-Id: I132f60829a967a48fd70e2f17f8fa5679aa57b80
Signed-off-by: Guenter Roeck <groeck@chromium.org>
7 files changed