U-Boot for PinePhone patchset

Changelog
=========
- 2021-06-22
  - Rebased on upstream U-Boot master branch
  - Added optional TOC0 support for those wishing to use secure mode

Prepare v2020.07-rc4

Prepare v2020.07-rc3

Prepare v2020.07-rc2

Prepare v2020.07-rc1

Prepare v2020.04

Prepare v2020.04-rc5

Prepare v2020.04-rc4

Prepare v2020.04-rc3

Prepare v2020.04-rc2

Prepare v2020.04-rc1

Prepare v2020.01

Prepare v2020.01-rc5

Prepare v2020.01-rc4