ASoC: wm0010: Set IRQ as a wake source

The DSPs IRQ should be a wake source as several of the possible
algorithms may run whilst the AP is asleepi and require to wake the AP
to push or pull more data, such as compressed playback.

Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>