stmmac: rewiew platform data

This patch rewiews and reorganises all the data
come from the platform removing any dependency
from the stm code.

Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --cc drivers/net/stmmac/stmmac.h
Simple merge

diff --cc drivers/net/stmmac/stmmac_main.c
Simple merge