ASoC: mediatek: mt8192: remove redundant null pointer check before of_node_put

of_node_put() has taken the null pointer check into account. So it is safe
to remove the duplicated check before of_node_put().

Signed-off-by: Chen Ni <nichen@iscas.ac.cn>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://patch.msgid.link/20240709085131.1436128-1-nichen@iscas.ac.cn


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