anv: correct a duplicate check in an assert

Looks like checking both sources was intended, instead of the first one
twice. Found with Coccinelle, coccinellery/xand/xand.cocci semantic patch.

Signed-off-by: Grazvydas Ignotas <notasas@gmail.com>
Reviewed-by: Tapani Pälli <tapani.palli@intel.com>

src/intel/vulkan/anv_nir_apply_pipeline_layout.c

@@ -147,7 +147,7 @@ lower_res_reindex_intrinsic(nir_intrinsic_instr *intrin,
     * array elements are sequential.  A resource_reindex just turns into an
     * add of the two indices.
     */
-   assert(intrin->src[0].is_ssa && intrin->src[0].is_ssa);
+   assert(intrin->src[0].is_ssa && intrin->src[1].is_ssa);
    nir_ssa_def *new_index = nir_iadd(b, intrin->src[0].ssa,
                                         intrin->src[1].ssa);