iommu/vt-d: Clean up unused PASID updating functions
update_pasid() and its call chain are currently unused in the tree because Thomas disabled the ENQCMD feature. The feature will be re-enabled shortly using a different approach and update_pasid() and its call chain will not be used in the new approach. Remove the useless functions. Signed-off-by: Fenghua Yu <fenghua.yu@intel.com> Reviewed-by: Tony Luck <tony.luck@intel.com> Link: https://lore.kernel.org/r/20210920192349.2602141-1-fenghua.yu@intel.comSigned-off-by: Lu Baolu <baolu.lu@linux.intel.com> Link: https://lore.kernel.org/r/20211014053839.727419-8-baolu.lu@linux.intel.comSigned-off-by: Joerg Roedel <jroedel@suse.de>
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