dt-bindings: iommu: rockchip: Add Rockchip RK3576

Just like RK3588, RK3576 is compatible to the existing rk3568
binding.

Signed-off-by: Andy Yan <andy.yan@rock-chips.com>
Reviewed-by: Heiko Stuebner <heiko@sntech.de>
Acked-by: Rob Herring (Arm) <robh@kernel.org>
Link: https://lore.kernel.org/r/20241231093154.252595-1-andyshrk@163.com


Signed-off-by: Joerg Roedel <jroedel@suse.de>