ASoC: audio-graph-card2: use of_graph_get_port_by_id() at graph_get_next_multi_ep()

Audio Graph Card2 is assuming "port" are necessarily in order, but there
is no guarantee in case of overlay. Use of_graph_get_port_by_id() instead
to handle it correctly.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Tested-by: Stephen Gordon <gordoste@iinet.net.au>
Link: https://patch.msgid.link/87sepwo5jf.wl-kuninori.morimoto.gx@renesas.com


Signed-off-by: Mark Brown <broonie@kernel.org>