EMAC platform device definitions have been moved to the respective SoC specific
files, also the resource structures have been simplified to represent a single
contiguous memory region.

Platform data has been suitably modified to add module offsets. PHY
address mask and maximum MDIO clock value has also been included in the
platform data structure.

The EMAC init is done by the EVM/board init function and not by the EEPROM
setup.
Signed-off-by: Chaithrika U S <chaithrika@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>