linux-imx

arm64: dts: r8a7795: add sound CTU support

This patch adds CTU (= Channel Transfer Unit) support which is needed
to sound mixing.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>