baikal-xgbe: fixed compilation errors

[asheplyakov]

drivers/net/ethernet/baikal/xgbe/xgbe-drv.c: In function ‘xgbe_poll_controller’:
drivers/net/ethernet/baikal/xgbe/xgbe-drv.c:1655:4: error: implicit declaration of function ‘xgbe_dma_isr’; did you mean ‘xgbe_dma_rx_isr’? [-Werror=implicit-function-declara
tion]
    xgbe_dma_isr(channel->dma_irq, channel);
    ^~~~~~~~~~~~
    xgbe_dma_rx_isr
drivers/net/ethernet/baikal/xgbe/xgbe-drv.c:1655:26: error: ‘struct xgbe_channel’ has no member named ‘dma_irq’; did you mean ‘tx_dma_irq’?
    xgbe_dma_isr(channel->dma_irq, channel);
                          ^~~~~~~
                          tx_dma_irq
drivers/net/ethernet/baikal/xgbe/xgbe-drv.c: At top level:
drivers/net/ethernet/baikal/xgbe/xgbe-drv.c:1756:19: error: initialization from incompatible pointer type [-Werror=incompatible-pointer-types]
  .ndo_setup_tc  = xgbe_setup_tc,
                   ^~~~~~~~~~~~~
drivers/net/ethernet/baikal/xgbe/xgbe-drv.c:1756:19: note: (near initialization for ‘xgbe_netdev_ops.ndo_setup_tc’)
drivers/net/ethernet/baikal/xgbe/xgbe-mdio.c: In function ‘be_xgbe_xmit_probe’:
drivers/net/ethernet/baikal/xgbe/xgbe-mdio.c:545:10: error: ‘struct phy_device’ has no member named ‘dev’; did you mean ‘drv’?
  phydev->dev.of_node = xmit_node;
          ^~~
          drv
drivers/net/ethernet/baikal/xgbe/xgbe-mdio.c:549:22: error: ‘struct phy_device’ has no member named ‘dev’; did you mean ‘drv’?
  put_device(&phydev->dev);
                      ^~~
                      drv

The driver compiles and successfully loads, however I haven't tested if the interface is operational (for I have no other 10Gb NICs/switches)