Merge branch 'stmmac-clocks'

Joakim Zhang says:

====================
net: stmmac: implement clocks management

This patch set tries to implement clocks management, and takes i.MX platform as an example.

---
ChangeLogs:
V1->V2:
	* change to pm runtime mechanism.
	* rename function: _enable() -> _config()
	* take MDIO bus into account, it needs clocks when interface
	is closed.
	* reverse Christmass tree.
V2->V3:
	* slightly simple the code according to Andrew's suggesstion
	and also add tag: Reviewed-by: Andrew Lunn <andrew@lunn.ch>
====================

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