ucc_geth: Implement suspend/resume and Wake-On-LAN support

This patch implements suspend/resume and WOL support for UCC Ethernet
driver.

We support two wake up events: wake on PHY/link changes and wake
on magic packet.

In some CPUs (like MPC8569) QE shuts down during sleep, so magic packet
detection is unusable, and also on resume we should fully reinitialize
UCC structures.

Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: David S. Miller <davem@davemloft.net>