ASoC: SOF: Add missing of_node_put() in imx8m_probe

The device_node pointer is returned by of_parse_phandle()  with refcount
incremented. We should use of_node_put() on it when done.

Fixes: afb93d71 ("ASoC: SOF: imx: Add i.MX8M HW support")
Signed-off-by: Miaoqian Lin <linmq006@gmail.com>
Reviewed-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
Link: https://lore.kernel.org/r/20220308023325.31702-1-linmq006@gmail.com


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