UPSTREAM: ASoC: rockchip: i2s: restore register during runtime_suspend/resume cycle

UPSTREAM: ASoC: rockchip: i2s: restore register during runtime_suspend/resume cycle

when step into runtime_suspend, i2s pd will be disabled and loss state.
so need to restore register when runtime_resume.

Change-Id: Ie37aba46f6ee21be2af404da24ba667e3ca86d6c
Signed-off-by: Sugar Zhang <sugar.zhang@rock-chips.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Douglas Anderson <dianders@chromium.org>
(cherry picked from git.kernel.org broonie/sound.git topic/rockchip
 commit f0447f6cbb202e1be8244d15aee390a96d65e490)