r600/sfn: Fix f2u32 and remove backend lowring of f2u64 and f2i64
The two conversion ops are now handled in nir_lower_int64,
but the fixup for the input to f2u32 has to be handled there
and not in f2u64.
Fixes:
29da9856826fa6a4b5117c43c78b4301a49bc6dd
nir/lower_int64: Enable lowering of 64-bit float to 64-bit integer conversions.
Signed-off-by: Gert Wollny <gert.wollny@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/19707>
(cherry picked from commit
fee004215755ee56a427e2ea96a5ab6dfa1ce823)