platforms->of_node and codes->of_node are assigned in probe function,
and of_node_put is called at the end of probe function, because of_node
seems to be not used after probe functon

In this patch, of_node_put is moved to platform remove function in case
of_node is used at any occasions after probe function in the future.
Signed-off-by: Trevor Wu <trevor.wu@mediatek.com>
Link: https://lore.kernel.org/r/20211001031601.3953-1-trevor.wu@mediatek.comSigned-off-by: Mark Brown <broonie@kernel.org>