v3d: Re-add support for memory_barrier_shared.

Looks like I lost it in a rebase conflict resolution.  We'd hit the
unknown intrinsic assertion in
KHR-GLES31.core.compute_shader.shared-struct.

Fixes: 6b1c659825 ("v3d: Add Compute Shader compilation support.")

src/broadcom/compiler/nir_to_vir.c

@@ -1845,6 +1845,7 @@ ntq_emit_intrinsic(struct v3d_compile *c, nir_intrinsic_instr *instr)
         case nir_intrinsic_memory_barrier_atomic_counter:
         case nir_intrinsic_memory_barrier_buffer:
         case nir_intrinsic_memory_barrier_image:
+        case nir_intrinsic_memory_barrier_shared:
         case nir_intrinsic_group_memory_barrier:
                 /* We don't do any instruction scheduling of these NIR
                  * instructions between each other, so we just need to make