anv: Implement new way for setting streamout buffers.

For gen12 we set the streamout buffers using 4 separate
commands instead of 3DSTATE_SO_BUFFER.

Signed-off-by: Plamena Manolova <plamena.manolova@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>

src/intel/vulkan/genX_gpu_memcpy.c

@@ -149,7 +149,12 @@ genX(cmd_buffer_so_memcpy)(struct anv_cmd_buffer *cmd_buffer,
                         VK_SHADER_STAGE_VERTEX_BIT, entry_size);
 
    anv_batch_emit(&cmd_buffer->batch, GENX(3DSTATE_SO_BUFFER), sob) {
+#if GEN_GEN < 12
       sob.SOBufferIndex = 0;
+#else
+      sob._3DCommandOpcode = 0;
+      sob._3DCommandSubOpcode = SO_BUFFER_INDEX_0_CMD;
+#endif
       sob.MOCS = anv_mocs_for_bo(cmd_buffer->device, dst.bo),
       sob.SurfaceBaseAddress = dst;