[PATCH v3] (respin) 802.1Q VLAN support for ADM6996M/ADM6996FC

This patch adds 802.1Q VLAN support for the ADM6996M chip.

The driver is loaded for both the FC and M model. It will detect which of the
two chips is connected. The FC model is initialised, but no further
functionality is offered.

The PHY driver will always report "100 Mbit/s, link up", for both the M and FC
models. This reflects the fact that the link between switch chip and Ethernet
MAC is always on[1].

Further documentation can be found in the kernel's
Documentation/networking/adm6996.txt

Signed-of-By: Peter Lebbing <peter@digitalbrains.com>
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@26865 3c298f89-4303-0410-b956-a3cf2f4a3e73