slimbus: Add support for IOMMU S1 translation

Add support for IOMMU stage 1 translation to protect the kernel memory
during slimbus transfer.

Change-Id: I01db86e767d0b350c175534e69371986e9a024c7
Signed-off-by: Karthikeyan Ramasubramanian <kramasub@codeaurora.org>
Signed-off-by: Sagar Dharia <sdharia@codeaurora.org>
5 files changed