driver core: Replace simple_strto{l,ul} by kstrtou{l,ul}

The simple_strto{l,ul} are deprecated, use kstrtou{l,ul} instead.

Signed-off-by: Kaitao cheng <pilgrimtao@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>