Merge branch 'net-stmmac-Stop-using-hard-coded-callbacks'

Jose Abreu says:

====================
net: stmmac: Stop using hard-coded callbacks

This a starting point for a cleanup and re-organization of stmmac.

In this series we stop using hard-coded callbacks along the code and use
instead helpers which are defined in a single place ("hwif.h").

This brings several advantages:
	1) Less typing :)
	2) Guaranteed function pointer check
	3) More flexibility

By 2) we stop using the repeated pattern of:
	if (priv->hw->mac->some_func)
		priv->hw->mac->some_func(...)

I didn't check but I expect the final .ko will be bigger with this series
because *all* of function pointers are checked.

Anyway, I hope this can make the code more readable and more flexible now.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>