Certain IPQ806x based platforms are making use of this PHY. So we'll
enable it so it gets detected as such.

Signed-off-by: Mathieu Olivari <mathieu@codeaurora.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@45535 3c298f89-4303-0410-b956-a3cf2f4a3e73