I am using both KSZ8041 and KSZ8873 and they both work with the same firmware.
I am using a MCF52259 and I modified the BSP by using the DEMO board example on the EVB platform.
There is no files for the KSZ8873 but it is very similar to the KSZ8041 so it works.
In the future I would like to add the additional features of the switch.