bnx2x: Removing old PHY FW upgrade code

This code should not have resided in the driver. Now that we have a new
interface, this logic can reside in the application that whishes to upgrade the
PHY FW

Signed-off-by: Eilon Greenstein <eilong@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>