arm/dt: 8974: Add new context banks for IOMMU

For 8974v2 Venus got two new context banks. Add these context
banks to the IOMMU definition.

Also change the label and sids for certain context banks.

Change-Id: Ic728c3339404d900b43fb75a34b3ba39de3bba82
Signed-off-by: Olav Haugan <ohaugan@codeaurora.org>
2 files changed