[Intel-gfx] [PATCH 1/2] drm/i915: Add enum aux_ch and clean up the aux init to use it

[Pandiyan, Dhinakaran]

On Wed, 2018-02-21 at 23:28 -0800, Dhinakaran Pandiyan wrote:
> From: Ville Syrjälä <ville.syrjala at linux.intel.com>
> 
> Since we no longer have a 1:1 correspondence between ports and AUX
> channels, let's give AUX channels their own enum. Makes it easier
> to tell the apples from the oranges, and we get rid of the
> port E AUX power domain FIXME since we now derive the power domain
> from the actual AUX CH.
> 
> v2: Rebase due to AUX F

Patch 2/2 has a dependency on this patch from Ville, so I have included
this patch for CI to test them together.

-DK