vfio/iova_bitmap: Export more API symbols
In preparation to move iova_bitmap into iommufd, export the rest of API
symbols that will be used in what could be used by modules, namely:
iova_bitmap_alloc
iova_bitmap_free
iova_bitmap_for_each
Link: https://lore.kernel.org/r/20231024135109.73787-2-joao.m.martins@oracle.com
Suggested-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Joao Martins <joao.m.martins@oracle.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Reviewed-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>