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The code which converts/copies color tiles to the linear layout has
been rewritten. There's less arithmetic and better loop unrolling,
and possibly a better memory access pattern.
Some demos, like gears, are about 20% faster now.
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Incorrect rendering until the interpolation code generation is updated.
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This is just a temporary change until we code generate the tile read/write
functions in runtime. The new code avoids an extra memcpy that exists in
u_tile.c functions, from which lp_tile_soa.c was originally based.
This achieves up to 5% improvement, particularly in frames with
little geometry overlap.
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