iommu: Better document the IOMMU_PRIV flag

This is a fairly subtle thing - let's make sure it's described as
clearly as possible to avoid potential misunderstandings.

Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
This commit is contained in:
Robin Murphy 2017-01-27 12:22:54 +00:00 • committed by Will Deacon
commit adf5e5168b