The AVB driver assumes there is an external clock, but it could
be driven by an external clock.
In order to enable a programmable^ is
clock, it needs to be added to the clocks list and enabled in the
driver. Since there currently only one clock, there is no
clock-names list either.[...]
Update bindings to add the additional optional clock, and explicitly
name both of them.
Signed-off-by: Adam Ford <aford173@xxxxxxxxx>