dt-bindings: net: lan966x: fix example

dt-bindings: net: lan966x: fix example

In commit 4fdabd509df3 ("dt-bindings: net: lan966x: remove PHY reset")
the PHY reset was removed, but I failed to remove it from the example.
Fix it.

Fixes: 4fdabd509df3 ("dt-bindings: net: lan966x: remove PHY reset")
Reported-by: Rob Herring <robh@kernel.org>
Signed-off-by: Michael Walle <michael@walle.cc>
Acked-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20220503132038.2714128-1-michael@walle.cc
Signed-off-by: Jakub Kicinski <kuba@kernel.org>