iommu/arm-smmu-v3: Remove the redundant shift operation of 'size'

virt inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I401IF


CVE: NA

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There is no reason to do the shift operation to 'size' in
arm_smmu_cache_invalidate().

Signed-off-by: Kunkun Jiang <jiangkunkun@huawei.com>
Reviewed-by: Keqian Zhu <zhukeqian1@huawei.com>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>