dt-bindings: PCI: Add host mode device-id for j721s2 platform

Add unique device-id of 0xb013 for j721s2 platform to oneOf field.

Link: https://lore.kernel.org/r/20221028091716.21414-1-mranostay@ti.com


Signed-off-by: Matt Ranostay <mranostay@ti.com>
Signed-off-by: Lorenzo Pieralisi <lpieralisi@kernel.org>
Acked-by: Rob Herring <robh@kernel.org>