dma: ste_dma40: Maintain spinlock order while handling pause

The runtime PM resume callback needs to be executed while holding the
spinlock, make sure to maintain this for the pause operation as well.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>