iommu/amd: Do not detach devices in domain free path

All devices attached to a protection domain must be freed before
calling domain free. Hence do not try to free devices in domain
free path. Continue to throw warning if pdom->dev_list is not empty
so that any potential issues can be fixed.

Signed-off-by: Vasant Hegde <vasant.hegde@amd.com>
Reviewed-by: Joerg Roedel <jroedel@suse.de>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/20241030063556.6104-7-vasant.hegde@amd.com


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