aco/wave32: Use wave_size for barrier intrinsic.

Signed-off-by: Timur Kristóf <timur.kristof@gmail.com>
Reviewed-by: Rhys Perry <pendingchaos02@gmail.com>
Reviewed-by: Daniel Schürmann <daniel@schuermann.dev>

src/amd/compiler/aco_instruction_selection.cpp

@@ -5631,7 +5631,7 @@ void visit_intrinsic(isel_context *ctx, nir_intrinsic_instr *instr)
    case nir_intrinsic_barrier: {
       unsigned* bsize = ctx->program->info->cs.block_size;
       unsigned workgroup_size = bsize[0] * bsize[1] * bsize[2];
-      if (workgroup_size > 64)
+      if (workgroup_size > ctx->program->wave_size)
          bld.sopp(aco_opcode::s_barrier);
       break;
    }