iommu: msm: Add label as required property

IOMMUs need to have a label naming the IOMMU device. This label
is used to create debugfs directory for performance monitor
interface.

Change-Id: I3ed1578ec296eaaae3e17dd513b3202e482b6c50
Signed-off-by: Olav Haugan <ohaugan@codeaurora.org>
3 files changed