adv748x: afe: add routing support

The adv748x afe has eight analog sink pads, currently one of them is
chosen to be the active route based on device tree configuration. With
the new routing API it's possible to control which of the eight sink
pads are routed to the source pad.

Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Reviewed-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
1 file changed