lima/ppir: Fix sin/cos lowering
This fixes the glsl-sin and glsl-cos piglit tests. Though it causes regressions, i think this is some random thing, which is not caused by this code changes: http://imkreisrum.de/piglit/master_fed6aa2fec3_sinfix/index.html
Signed-off-by: Andreas Baierl ichgeh@imkreisrum.de