iommu/rockchip: Prohibit unbind and remove
Removal of IOMMUs cannot be done reliably. This is similar to exynos iommu driver. Signed-off-by: Jeffy Chen <jeffy.chen@rock-chips.com> Reviewed-by: Tomasz Figa <tfiga@chromium.org> Acked-by: Robin Murphy <robin.murphy@arm.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
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