drivers: ethernet: Add support for new PHY API

SDK 2.10 changed the PHY API. These updates are
needed as part of moving to SDK 2.10

1. add phy / mdio ops init
2. update PHY_Read/Write HAL call

Signed-off-by: Hake Huang <hake.huang@oss.nxp.com>
Signed-off-by: Mahesh Mahadevan <mahesh.mahadevan@nxp.com>