nvc0/ir: fix constraints for OP_SUSTx on Kepler

Destination type is actually always 32-bits, so typeSizeof() returns 4
and no sources are condensed.

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Ilia Mirkin <imirkin@alum.mit.edu>
1 file changed