arm64: zynqmp: Describe TI phy as ethernet-phy-id with reset on zcu106

zcu106 also connects ethernet phy reset via tca6416 chip as is done on
other evaluation boards. That's why describe this connection to make sure
that ethernet phy is reset before it's use.

Signed-off-by: Michal Simek <michal.simek@amd.com>
Link: https://lore.kernel.org/r/21ccd672b799b5858021f6059098a1247c311fae.1668596358.git.michal.simek@amd.com