iommu: fix kabi issue with KABI_EXTEND macro

Intel inclusion
category: feature
bugzilla: https://gitee.com/openeuler/intel-kernel/issues/I8C8B4


CVE: N/A

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Fix kabi issue with KABI_EXTEND() macro.

Signed-off-by: Ethan Zhao <haifeng.zhao@linux.intel.com>