ASoC: omap-hdmi: Remove excess curly bracket

Fix the error added by commit:
ASoC: omap-hdmi: Bind the platform driver to the dai driver when loading

Reported-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Mark Brown <broonie@linaro.org>