amd8111e: Convert to generic power management

Drivers should not save device registers and/or change the power state of
the device. As per the generic PM approach, these are handled by PCI core.

The driver should support dev_pm_ops callbacks and bind them to pci_driver.

Compile-tested only.

Signed-off-by: Vaibhav Gupta <vaibhavgupta40@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>