iommu/vt-d: Set variable intel_dirty_ops to static

mainline inclusion
from mainline-v6.7-rc4
commit e378c7de74620051c3be899a8c2506c25d23049d
category: feature
bugzilla: https://gitee.com/openeuler/intel-kernel/issues/I8Y6AM
CVE: NA

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?e378c7de74620051c3be899a8c2506c25d23049d



--------------------------------

Fix the following warning:
drivers/iommu/intel/iommu.c:302:30: warning: symbol
 'intel_dirty_ops' was not declared. Should it be static?

This variable is only used in its defining file, so it should be static.

Intel-SIG: e378c7de7462 iommu/vt-d: Set variable intel_dirty_ops to static
Backport IOMMUFD Dirty Tracking

Fixes: f35f22cc760e ("iommu/vt-d: Access/Dirty bit support for SS domains")
Signed-off-by: Kunwu Chan <chentao@kylinos.cn>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: Joao Martins <joao.m.martins@oracle.com>
Link: https://lore.kernel.org/r/20231120101025.1103404-1-chentao@kylinos.cn


Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
[ jz: amend commit log ]
Signed-off-by: Jason Zeng <jason.zeng@intel.com>