Enables CONFIG_DWMAC_RK as a built-in kernel module. The reason it's not a normal module is because it takes forever otherwise to load, preventing potentially cool things such as nfs for root filesystems. arm-generic will also have this, but as a module. BUG=chrome-os-partner:36026 TEST=Driver is present and can be modprobed Change-Id: I28f6542c046eef56b265f9050d8fbd8650572467 Signed-off-by: Alexandru M Stan <amstan@chromium.org> Reviewed-on: https://chromium-review.googlesource.com/251190 Reviewed-by: Roger Chen <roger.chen@rock-chips.com> Reviewed-by: Douglas Anderson <dianders@chromium.org>