[Mesa-stable] Freedreno glxgears for 13.0

[Emil Velikov]

As mentioned on IRC

<ndec> 10:52:30> robclark: 16f6ceaca9e25f86bcdc509fc0abb48e2d51c3fa is
the commit that 'fixed' the regression i am seeing with glxgears in
mainline. i am trying now to find when the regression was introduced.
...
<robclark> ndec, so 16f6ceaca9e25f86bcdc509fc0abb48e2d51c3fa
cherry-picks cleanly on 13.0 branch..  it was just a prep-work patch
so it should be safe to cherry-pick without the later patches from
master..  seems to build ok, so if that fixes the problem I think we
should just add that patch to 13.0
<robclark> xexaxo1, ^^^

-Emil