Convert the K3 NavigatorSS Ring Accelerator bindings documentation to
json-schema.

Cc: Rob Herring <robh+dt@kernel.org>
Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Reviewed-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>