ASoC: rt5670: Set RT5670_IRQ_CTRL1 non volatile

commit 850529249d7cce02e9bfae9476d09c8c51410d28 upstream.

RT5670_IRQ_CTRL1(0xbd) is a non volatile register. And we need to
restore its value after suspend/resume.

Signed-off-by: Bard Liao <bardliao@realtek.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>