soc: ti: k3-ringacc: Use the ti_sci set_cfg callback for ring configuration

Switch to the new set_cfg to configure the ring.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Reviewed-by: Grygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>