turnip: implement LRZ direction
There are some LRZ compare op switches that are not supported by the HW, like GREATER* <-> LESS* ones. This patch tracks the direction of the switch and disables LRZ if needed. Signed-off-by:Samuel Iglesias Gonsálvez <siglesias@igalia.com> Reviewed-by:
Eric Anholt <eric@anholt.net> Part-of: <!7186>
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