firmware: qcom: scm: Use devm_reset_controller_register()

Use devm_reset_controller_register() for the reset controller
registration and fixes the memory leak when unload the module.

Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: Andy Gross <andy.gross@linaro.org>
(cherry picked from commit bd4760ca)
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>