dt-bindings: arm: Add Morello compatibility

dt-bindings: arm: Add Morello compatibility

Add compatibility to Arm Morello System Development Platform.

Note: Morello is at the same time the name of an Architecture [1], an SoC
[2] and a Board [2].
To distinguish in between Architecture/SoC and Board we refer to the first
as arm,morello and to the second as arm,morello-sdp.

[1] https://developer.arm.com/Architectures/Morello
[2] https://www.morello-project.org/

Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Message-Id: <20250221180349.1413089-3-vincenzo.frascino@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>