[PATCH 07/11] iommu: Do not export iommu_device_link/unlink()

[Tian, Kevin]

> From: Jason Gunthorpe <jgg at nvidia.com>
> Sent: Thursday, April 20, 2023 12:12 AM
> 
> These are not used outside iommu.c, they should not be available to
> modular code.
> 
> Signed-off-by: Jason Gunthorpe <jgg at nvidia.com>

Reviewed-by: Kevin Tian <kevin.tian at intel.com>