iommu/arm-smmu: Delete an unnecessary check before the function call "free_io_pgtable_ops"
The free_io_pgtable_ops() function tests whether its argument is NULL and then returns immediately. Thus the test around the call is not needed. This issue was detected by using the Coccinelle software. Signed-off-by: NMarkus Elfring <elfring@users.sourceforge.net> Signed-off-by: NWill Deacon <will.deacon@arm.com> Signed-off-by: NJoerg Roedel <jroedel@suse.de>
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