iommu/arm-smmu: add support to configure IOVA range

For IOMMU clients the DMA layer only allocates IOVA addresses within the
range specified by the qcom,iommu-dma-addr-pool DT property.
The remaining IOVA addresses outside of this range, but limited to
[0 - 4GB) for fastmap clients, can be used by calls such as iommu_map and
iommu_map_sg.

Fastmap pre-allocates the page tables for its fully supported IOVA range,
which is [0 - 4GB), and this consumes 8MB of memory. Because clients often
don't use most of the IOVA addresses outside of the DMA layer IOVA range
allow fastmap clients to use the qcom,iommu-geometry DT property to
specify only the IOVA range which needs to be supported in order to save
memory.

CRs-Fixed: 2035925
Change-Id: Ib389e019a022d98417884002de08115fb0fc9384
[lmark@codeaurora.org: removed support for DOMAIN_ATTR_GEOMETRY domain]
Signed-off-by: Liam Mark <lmark@codeaurora.org>
[guptap@codeaurora.org: update geometry.aperture with mapping]
Signed-off-by: Prakash Gupta <guptap@codeaurora.org>