ASoC: omap-abe-twl6040: Add complete DAPM routing

SDP4430 is a reference platform, and as such it has all possible
audio routing implemented.
Correct the DAPM routing to be complete.

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