ASoC: meson: Use helper function for_each_child_of_node_scoped()

ASoC: meson: Use helper function for_each_child_of_node_scoped()

The for_each_child_of_node_scoped() helper provides a scope-based
clean-up functionality to put the device_node automatically, and
as such, there is no need to call of_node_put() directly.

Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202505210557.EpJig9BQ-lkp@intel.com/
Signed-off-by: Ai Chao <aichao@kylinos.cn>
Link: https://patch.msgid.link/20250603055109.3154061-4-aichao@kylinos.cn
Signed-off-by: Mark Brown <broonie@kernel.org>