arm64: dts: ti: k3-am654-main: Add McASP nodes

Add the nodes for McASP 0-2 and keep them disabled because several
required properties are not present as they are board specific.

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>