Description of problem:
Mesa now supports a Gallium driver for Skylake and later GPUs from Intel but the driver is not built with the current mesa.spec file. 

Version-Release number of selected component (if applicable):


How reproducible:
Always until -Dgallium-drivers is changed from:

 -Dgallium-drivers=swrast,virgl,r300,nouveau%{?with_vmware:,svga}%{?with_radeonsi:,radeonsi,r600}%{?with_freedreno:,freedreno}%{?with_etnaviv:,etnaviv}%{?with_tegra:,tegra}%{?with_vc4:,vc4}%{?with_kmsro:,kmsro} \

to 

 -Dgallium-drivers=swrast,virgl,r300,iris,nouveau%{?with_vmware:,svga}%{?with_radeonsi:,radeonsi,r600}%{?with_freedreno:,freedreno}%{?with_etnaviv:,etnaviv}%{?with_tegra:,tegra}%{?with_vc4:,vc4}%{?with_kmsro:,kmsro} \

I don't know if "iris" requires any conditions but by adding it in, lib[64]dri-drivers now has the iris driver which seems to work correctly, at least with glxgears -info.  

After adding it in and compiling rpm -qil lib64dri-drivers shows this:

/usr/lib64/dri
/usr/lib64/dri/i915_dri.so
/usr/lib64/dri/i965_dri.so
/usr/lib64/dri/iris_dri.so
/usr/lib64/dri/kms_swrast_dri.so

At present iris is not enabled by default and requires MESA_LOADER_DRIVER_OVERRIDE=iris to enable, thus by building this additional driver it should not impact anyone except those who choose to use iris.

More here:

https://www.phoronix.com/scan.php?page=article&item=iris-pro-mesa191&num=1



Steps to Reproduce:
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