msm: Update Ion and IOMMU APIs to use dma_addr_t

The current APIs for Ion and the custom IOMMU mapping assume that
many parameters are unsigned long. This type is not big enough to
hold physical addresses on LPAE systems. Update the APIs to accomodate
these types. Because we are updating the APIs, all clients need to be
updated as well, either by using the correct type or using a cast
where necessary.

Change-Id: I12e6fb6ec8a8481a7eef374cb9316e5ccbc29090
Signed-off-by: Laura Abbott <lauraa@codeaurora.org>