nir: Check all sizes in nir_alu_instr_is_comparison

nir_alu_instr_is_comparison needs to consider all comparison opcodes regardless of size. Otherwise, they will be missed by nir_opt_move/sink.

Without this change, lowering booleans to integers regresses register pressure (and spills/fills) significantly in certain shaders on Panfrost, like android/com.miHoYo.GenshinImpact/1420.shader_test.

Signed-off-by: Alyssa Rosenzweig alyssa@collabora.com