ARM: omap4: hwmod_data: Clean up audio related structures (remove/merge them)

All audio related omap_hwmod_ocp_if *_dma can be removed from the data since
we can just add the user flag to the non dma structure.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Paul Walmsley <paul@pwsan.com>