Adds "DaVinci-EMAC" as the name of the device so that
it gets printed as "Using DaVinci-EMAC device"
during network access (dhcp, tftp) instead of empty name
in "Using" statement.This name also gets
reflected in 'ethact' env variable.


Signed-off-by: Hemant Pedanekar <hemantp@ti.com>
Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>