aco: add 32-bit integer addition to can_swap_operands

fossil-db (Navi):
Totals from 167 (0.12% of 135946) affected shaders:
CodeSize: 484892 -> 482628 (-0.47%)

Signed-off-by: Rhys Perry <pendingchaos02@gmail.com>
Reviewed-by: Daniel Schürmann <daniel@schuermann.dev>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5695>
1 file changed