[TF-A] [Request for review] Downstream patches from Tegra repos

Hello team,

Requesting reviews for the latest patches [1] form our internal repos for Tegra platforms. I have updated the verification steps for each patch in the comments to help answer some questions.

Thanks in advance.

-Varun

[1] https://review.trustedfirmware.org/q/topic:%22tegra-downstream-08252020%22+(...)