Merge branch 'armtf/master/update' into bootloader-update

Big transition to upstream ARMTF code.

This merges the aosp/mater code with fd3bba4bd523 but merges
such that the tree should be identical with the fd3bba4bd523
side of the merge.

Change-Id: Ib416a13ce19c6c26fb62c38ccc6fdfbbdf9c4304
Signed-off-by: John Stultz <john.stultz@linaro.org>