[PATCH v7 2/3] PCI: Enable PCIe Relaxed Ordering if supported

[David Laight]

From: Casey Leedom
> Sent: 04 August 2017 21:49
...
> Whenever our Hardware Designers implement new functionality in our hardware,
> they almost always put in A. several "knobs" which can control fundamental
> parameters of the new Hardware Feature, and B.  a mechanism of completely
> disabling it if necessary.  This stems from the incredibly long Design ->
> Deployment cyle for Hardware (as opposed to the edit->compile->run cycle for s!

Indeed, I'd also expect there to be an undocumented flag to turn
it on (broken) in earlier parts to allow testing.

	David