pan/bi: Fix clper_xor on Mali-G31
Mali-G31 has the old CLPER instruction, not the new one, which means we don't get to specify a custom lane op. But the clper_xor helper incorrectly checked the arch, not the implementation quirk.
Fixes: c00e7b729fe ("pan/bi: Optimize abs(derivative)")
Signed-off-by: Alyssa Rosenzweig <alyssa@collabora.com>
Reported-by: Icecream95 <ixn@disroot.org>
Edited by Alyssa Rosenzweig