ASoC: omap: n810: Correct the cpu_dai, platform and codec name

The non DT boot is no longer supported and when booting with DT the device
names are different.

Fix them up for now, but the n810.c should be updated to support probing
via DT with proper bindings.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Acked-by: Jarkko Nikula <jarkko.nikula@bitmer.com>
Signed-off-by: Mark Brown <broonie@kernel.org>