dt-bindings: interrupt-controller: Add SDX75 PDC compatible

Add device tree bindings for PDC on SDX75 SOC.

Signed-off-by: Rohit Agarwal <quic_rohiagar@quicinc.com>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/r/20231117082829.609882-1-quic_rohiagar@quicinc.com


Signed-off-by: Rob Herring <robh@kernel.org>