[Intel-gfx] [patch] drm/i915: Add PCI IDs for Skylake GT1.5

[Alexei Podtelezhnikov]

> > These devices are also known as iSKLULTGT15 and iSKLDTGT15.
>
> We also seem to be missing 0x1915 from the ulx list.

Indeed, iSKLULXGT15 can be found.

> Another odd things I noticed in our SKL PCI ID lists is that
> that 0x1923 and 0x1927 are potentially miscategorized. They
> are listed as ULT in some parts of the spec whereas we have
> them in the non-ULT/ULX list. Also 0x1927 is listed as Iris
> graphics 550, and ark.intel.com says that it can be found
> in the i5-6267U CPU, which is ULT. The other one is listed
> as HD Graphics 535 which does give some ULT google hits based
> on the Windows drivers. So looks like we should make these ULT.

Ditto for iSKLULTGT3 and iSKLULTGT328W.

> The third odd thing is that 0x192a is listed as both GT3 and GT4
> in the spec. Not really able to find corroborating evidence one
> way or the other unfortunately.

Hypothetical iSKLSRVGT3 cannot be found, whereas iSKLSRVGT3e and
iSKLSRVGT4 are already assigned differently.