net: zynq_gem: Move ethernet info print statement

As we are not reading the PHY address in case of CONFIG_ETH_PHY in plat
function, phy address always prints as -1. So move the ethernet info
print statement to probe function, to display proper phy address.

Signed-off-by: T Karthik Reddy <t.karthik.reddy@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Link: https://lore.kernel.org/r/f6efc6719d767b1bebe65987c22c6d52329f4225.1648631275.git.michal.simek@xilinx.com