dmaengine: Remove Renesas Audio DMAC peri peri platform data

Commit 3cd44dcd ("dmaengine: remove Renesas Audio DMAC peri peri")
forgot to remove the header file with the platform data definitions.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>