Required to avoid tiler heap out-of-memory condition on Valhall on tests including:
dEQP-GLES31.functional.draw_indirect.compute_interop.large.drawelements_combined_grid_1200x1200_drawcount_8
This test passes on Bifrost without the fix because varyings are only allocated from the tiler heap on Valhall.
Minimal perf or memory usage impacted is expected, as even old versions of panfrost.ko support growable memory.
Signed-off-by: Alyssa Rosenzweig alyssa@collabora.com