vc4, v3d, freedreno: nir lowering helpers
Makes use of the new helpers to hopefully reduce the work @jekstrand needs to do in the NIR metadata series. vc4 tested, v3d nearly so, freedreno still to do.
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Makes use of the new helpers to hopefully reduce the work @jekstrand needs to do in the NIR metadata series. vc4 tested, v3d nearly so, freedreno still to do.