r300: simplify KILL transformation
We had some special cases before when we could actually get some IFs on
R300 with VDPAU. Now that VDPAU is gone and everything goes through
ntt, we don't have to worry anymore. Remove the complicated logic and
just always transform KILL into KIL none.-1
No shader-db change on RV530 or RV370.
Signed-off-by: Pavel Ondračka <pavel.ondracka@gmail.com>
Reviewed-by: Emma Anholt <emma@anholt.net>
Reviewed-by: Filip Gawin <filip@gawin.net>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/21503>