Revise printk level of BCM54616 PHY driver to KERN_INFO

Accton AS6701_32X uses gianfar ethernet driver to control the PHY.
The PHY driver shall not always display the "Auto-neg error,
defaulting to 1000/HD" message after booting.

Signed-off-by: Curt Brune <curt@cumulusnetworks.com>