[PATCH i-g-t 0/3] Fence register stuff

[ville.syrjala at linux.intel.com (ville.syrjala at linux.intel.com)]

Some fence stuff related to the 32 fence registers/256KB max fence stride
kernel changes.

I'm not sure gem_tiling_max_stride does any good since you can only use
it to verify that the tested fence stride <= max fence stride. Also I
ran it only on ILK,SNB and IVB, so at least the Gen2-3 code is
totally untested.