ASoC: omap-abe-twl6040: Correct internal prefix, Kconfig entry

Change the internal prefixes within the driver from sdp4430.
At he same time correct the Kconfig text as well.

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