Whoever ventures to help me with the Ethernet MAC library, here what I have done regarding the EMAC pin configuration:
-I added in the variant.cpp the EMAC pin definition (lines 291 to 301) and the initialization of the EMAC Pio configuration (lines 431 to 485).
-I added in the variant.h the defines of the EMAC pins (lines 187 to 202).
Here a picture of my test of the DM9161 board. My test with the DP83848 still pending. I also still trying to get help from Atmel technical support team.
But don't worry, I will solve it.
Regards!