dt-bindings: firmware: svc: Add IOMMU support for Agilex5

dt-bindings: firmware: svc: Add IOMMU support for Agilex5

In Agilex5, the TBU (Translation Buffer Unit) can now operate in non-secure
mode, enabling Linux to utilize it through the IOMMU framework. This allows
improved memory management capabilities in non-secure environments. With
Agilex5 lifting this restriction, we are now extending the device tree
bindings to support IOMMU for the Agilex5 SVC.

Signed-off-by: Khairul Anuar Romli <khairul.anuar.romli@altera.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Dinh Nguyen <dinguyen@kernel.org>