ASoC: cros_ec_codec: Fix refcount leak in cros_ec_codec_platform_probe

ASoC: cros_ec_codec: Fix refcount leak in cros_ec_codec_platform_probe

of_parse_phandle() returns a node pointer with refcount
incremented, we should use of_node_put() on it when not need anymore.
Add missing of_node_put() to avoid refcount leak.

Fixes: fbd2ab6fcfb1 ("ASoC: cros_ec_codec: support WoV")
Signed-off-by: Miaoqian Lin <linmq006@gmail.com>
Reviewed-by: Tzung-Bi Shih <tzungbi@kernel.org>
Reviewed-by: Guenter Roeck <groeck@chromium.org>
Link: https://lore.kernel.org/r/20220603131043.38907-1-linmq006@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>