gallium/docs: Fix an inequality sign of TGSI_SEMANTIC_SUBGROUP_LT_MASK

A previous expression presents same as TGSI_SEMANTIC_SUBGROUP_GT_MASK.
It fixes a direction of an inequality for TGSI_SEMANTIC_SUBGROUP_LT_MASK.

before:
  bit index > TGSI_SEMANTIC_SUBGROUP_INVOCATION

after:
  bit index < TGSI_SEMANTIC_SUBGROUP_INVOCATION

Signed-off-by: Mun Gwan-gyeong <elongbug@gmail.com>
Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>
1 file changed