ASoC: mt6797-mt6351: Fix refcount leak in mt6797_mt6351_dev_probe

ASoC: mt6797-mt6351: Fix refcount leak in mt6797_mt6351_dev_probe

[ Upstream commit 888c10e0a6ed9a4124f51ee63e1bda476bdf2c7b ]

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: 2b819d97c5a7 ("ASoC: add mt6797-mt6351 driver and config option")
Signed-off-by: Miaoqian Lin <linmq006@gmail.com>
Link: https://lore.kernel.org/r/20220603083417.9011-1-linmq006@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>