msm: iommu: Create iommu api to return the page table address

Create a new iommu api to return the base address of the domain's
pagetable.

Change-Id: Ibf5425fa7ae253b16bfe795614bd7943efd7e3e3
Signed-off-by: Shubhraprakash Das <sadas@codeaurora.org>
diff --git a/drivers/base/iommu.c b/drivers/base/iommu.c
index 6507d8b..ea2a1df6 100644
--- a/drivers/base/iommu.c
+++ b/drivers/base/iommu.c
@@ -171,3 +171,12 @@
 	return iommu_ops->unmap_range(domain, iova, len);
 }
 EXPORT_SYMBOL_GPL(iommu_unmap_range);
+
+phys_addr_t iommu_get_pt_base_addr(struct iommu_domain *domain)
+{
+	if (!iommu_found())
+		return 0;
+
+	return iommu_ops->get_pt_base_addr(domain);
+}
+EXPORT_SYMBOL_GPL(iommu_get_pt_base_addr);