ASoC: OMAP4: Rename the sdp4430 machine driver

The same machine driver will support other boards
with similar audio configuration (OMAP4, ABE, twl6040).
Rename the driver to have more generic name.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>