ASoC: wm8994: missing break in wm8994_aif3_hw_params()

The missing break here means that we always return early and the
function is a no-op.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Cc: stable@vger.kernel.org