api: codec: Extend API

Add sample rates. Add dai_route_t enum to allow codec configuration for
duplex operation. Allow for audio inputs to be controlled. Add functions
for signal routing.

Signed-off-by: Hake Huang <hake.huang@oss.nxp.com>
Signed-off-by: Vit Stanicek <vit.stanicek@nxp.com>