aco: Fix VcmpxExecWARHazard mitigation.
The SOPP instruction shouldn't have a definition, and its block should be set to -1 in order to prevent it from being recognized as a branch. Also fix a typo in the readme.
The SOPP instruction shouldn't have a definition, and its block should be set to -1 in order to prevent it from being recognized as a branch. Also fix a typo in the readme.