drivers: eth: phy: tja1103: Handle link change

drivers: eth: phy: tja1103: Handle link change
These changes enable -
TJA1103 driver to gracefully handle Link connect or disconnect events
between Ethernet PHY and its link partner and notify it to the
upper network layers

Signed-off-by: Sumit Batra <sumit.batra@nxp.com>