iommu: Properly export iommu_group_get_for_dev()

In commit a7ba5c3 ("drivers/iommu: Export core IOMMU API symbols to
permit modular drivers") a bunch of iommu symbols were exported, all
with _GPL markings except iommu_group_get_for_dev().  That export should
also be _GPL like the others.

Fixes: a7ba5c3 ("drivers/iommu: Export core IOMMU API symbols to permit modular drivers")
Signed-off-by: Greg Kroah-Hartman <[email protected]>
Acked-by: Will Deacon <[email protected]>
Cc: Joerg Roedel <[email protected]>
Cc: John Garry <[email protected]>
Cc: Will Deacon <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Joerg Roedel <[email protected]>

Author: gregkh

drivers/iommu/iommu.c

@@ -1429,7 +1429,7 @@ struct iommu_group *iommu_group_get_for_dev(struct device *dev)
 
 	return group;
 }
-EXPORT_SYMBOL(iommu_group_get_for_dev);
+EXPORT_SYMBOL_GPL(iommu_group_get_for_dev);
 
 struct iommu_domain *iommu_group_default_domain(struct iommu_group *group)
 {