ARM: DTS: omap5-uevm: Add node for twl6040 audio codec

The board uses twl6040 as audio codec. Move the corresponding  pinctrl as
well under the node.
twl6040 needs 32k clock from palams.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>