ANDROID: GKI: iommu/io-pgtable-arm: LPAE related updates by vendor

This is a snapshot of iommu/io-pgtable-arm as of commit 79efc458af96.
Most of the changes are related to LPAE. The Signed-off-bys of all the
commits has been copied over.

Signed-off-by: Sudarshan Rajagopalan <sudaraja@codeaurora.org>
Signed-off-by: Prakash Gupta <guptap@codeaurora.org>
Signed-off-by: Vinayak Menon <vinmenon@codeaurora.org>
Signed-off-by: Swathi Sridhar <swatsrid@codeaurora.org>
Bug: 155522481
Signed-off-by: Mark Salyzyn <salyzyn@google.com>
Signed-off-by: Saravana Kannan <saravanak@google.com>
Change-Id: I375f3c4d43c23818ae2e2c1963cda474328e677f