ASoC: rsnd: remove unneeded of_node_put()

The loop is not using "node", of_node_put(node) is not needed.

Cc: Julia Lawall <julia.lawall@inria.fr>
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Link: https://lore.kernel.org/r/8734zlilmd.wl-kuninori.morimoto.gx@renesas.com


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