iommu/vt-d: Remove BUG_ON in dmar_insert_dev_scope()

The dmar_insert_dev_scope() could fail if any unexpected condition is
encountered. However, in this situation, the kernel should attempt
recovery and proceed with execution. Remove BUG_ON with WARN_ON, so that
kernel can avoid being crashed when an unexpected condition occurs.

Signed-off-by: Tina Zhang <tina.zhang@intel.com>
Link: https://lore.kernel.org/r/20230406065944.2773296-8-tina.zhang@intel.com


Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>