memory: mtk-smi: add missing put_device() call in mtk_smi_device_link_common

memory: mtk-smi: add missing put_device() call in mtk_smi_device_link_common

The reference taken by 'of_find_device_by_node()' must be released when
not needed anymore.
Add the corresponding 'put_device()' in the error handling paths.

Fixes: 47404757702e ("memory: mtk-smi: Add device link for smi-sub-common")
Signed-off-by: Miaoqian Lin <linmq006@gmail.com>
Link: https://lore.kernel.org/r/20220601120118.60225-1-linmq006@gmail.com
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>