iommu/amd: Remove outdated comment

Comment is not related to amd_iommu_ops variable.
Signed-off-by: NVasant Hegde <vasant.hegde@amd.com>
Link: https://lore.kernel.org/r/20220912063248.7909-5-vasant.hegde@amd.comSigned-off-by: NJoerg Roedel <jroedel@suse.de>

drivers/iommu/amd/iommu.c

@@ -66,10 +66,6 @@ LIST_HEAD(ioapic_map);
 LIST_HEAD(hpet_map);
 LIST_HEAD(acpihid_map);
 
-/*
- * Domain for untranslated devices - only allocated
- * if iommu=pt passed on kernel cmd line.
- */
 const struct iommu_ops amd_iommu_ops;
 
 static ATOMIC_NOTIFIER_HEAD(ppr_notifier);