etnaviv: fix GLES2 texturing issues (GC2000/GC3000)
This series includes patches to pass all dEQP-GLES2.functional.texture.*
tests on GC2000/GC3000. Only exception is warnings in dEQP-GLES2.functional.texture.mipmap.cube.*
because of sampling from wrong LOD for a corner pixel (looks like a HW problem?)
Edited by Jonathan Marek