arm64: dts: ti: k3-j721e: DMA support

Add the ringacc and udmap nodes for main and mcu NAVSS.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Reviewed-by: Lokesh Vutla <lokeshvutla@ti.com>
Signed-off-by: Tero Kristo <t-kristo@ti.com>