dt-bindings: soc: ti: Update TI PRUSS bindings about schemas to include

Now after ti,pruss-intc.yaml and ti,pru-rproc.yaml are merged, include
them in proper property and extend the examples section.

At the occasion extend the allowed property list about dma-ranges.

Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Grzegorz Jaszczyk <grzegorz.jaszczyk@linaro.org>
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>