[Skiboot] [PATCH] phb4: Disable lane eq when retrying some nvidia GEN3 devices

[Russell Currey]

On Thu, 2018-02-22 at 10:52 +1100, Michael Neuling wrote:
> This fixes these nvidia cards training at only GEN2 spends rather
> than
> GEN3 by disabling PCIe lane equalisation.
> 
> Firstly we check if the card is in a whitelist.  If it is and the
> link
> has not trained optimally, retry with lane equalisation off. We do
> this on all POWER9 chip revisions since this is a device issue, not
> a POWER9 chip issue.
> 
> Signed-off-by: Michael Neuling <mikey at neuling.org>

Reviewed-by: Russell Currey <ruscur at russell.cc>