ASoC: tlv320dac33: Fix compillation error

Fix the compilation error introduced by patch:
ASoC: tlv320dac33: Avoid multiple soft power up

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@nokia.com>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>