[PATCH v1 03/12] iommufd: Use enum iommu_viommu_type for type in struct iommufd_viommu

[Tian, Kevin]

> From: Nicolin Chen <nicolinc at nvidia.com>
> Sent: Tuesday, June 10, 2025 1:13 AM
> 
> Replace unsigned init, to make it clear. No functional changes.
> 
> The viommu_alloc iommu op will be deprecated, so don't change that.
> 
> Signed-off-by: Nicolin Chen <nicolinc at nvidia.com>

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