nir, intel/compiler: Add support for ROR/ROL instructions

Sagar Ghuge requested to merge sagarghuge/mesa:rotate into master

For Gen >= 11, add support for rotate [Right/Left] instructions. There are no shaders in shader-db which can benefit from this change.

Tested these changes with piglit!74 (merged)

Patch nir: Add lower_rotate flag and set to true in all drivers enable the other drivers to lower rotate instruction which are not prepared to handle it.

Thanks to @mattst88 for suggesting/helping me on this exercise.

Edited by Sagar Ghuge

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