dt-bindings: interrupt-controller: Add BCM2712 MSI-X bindings

Add bindings for BCM2712 MSI-X interrupt peripheral controller.

Signed-off-by: Stanimir Varbanov <svarbanov@suse.de>
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Reviewed-by: Florian Fainelli <florian.fainelli@broadcom.com>
Tested-by: Ivan T. Ivanov <iivanov@suse.de>
Link: https://lore.kernel.org/r/20250224083559.47645-2-svarbanov@suse.de


[kwilczynski: commit log]
Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>