[0/7,v4] EFI variable support via OP-TEE

Hi!

This is the v4 of the patchset adding EFI variable support via OP-TEE
originally posted here [1] [2] [3] 

changes since v3:
* patch 3: 
  - remove the default attributes if the user doesn't specify any
  - print the EFI error message coming from StMM in case of failure
* patch 6: 
  - Align the defconfig with the existing lx2160ardb one
* patch 7 (new patch)
  - Add an OP-TEE node on lx2160ardb dts

[1] https://lists.denx.de/pipermail/u-boot/2020-May/410772.html
[2] https://lists.denx.de/pipermail/u-boot/2020-May/411603.html
[3] https://lists.denx.de/pipermail/u-boot/2020-May/412223.html

Ilias Apalodimas (6):
  efi_loader: Implement EFI variable handling via OP-TEE
  cmd: efidebug: Add support for querying UEFI variable storage
  MAINTAINERS: Add maintainer for EFI variables via OP-TEE
  doc: uefi.rst: Add OP-TEE variable storage config options
  configs: lx2160a: Add default config for lx2160a using StMM in OP-TEE
  dts: nxp2160ardb: add op-tee node

Sughosh Ganu (1):
  efi_loader: Add headers for EDK2 StandAloneMM communication

 MAINTAINERS                           |   6 +
 arch/arm/dts/fsl-lx2160a.dtsi         |   6 +
 board/freescale/lx2160a/MAINTAINERS   |   1 +
 cmd/efidebug.c                        |  58 ++-
 configs/lx2160ardb_tfa_stmm_defconfig |  85 ++++
 doc/uefi/uefi.rst                     |  17 +
 include/mm_communication.h            | 208 ++++++++
 lib/efi_loader/Kconfig                |   9 +
 lib/efi_loader/Makefile               |   4 +
 lib/efi_loader/efi_variable_tee.c     | 662 ++++++++++++++++++++++++++
 10 files changed, 1055 insertions(+), 1 deletion(-)
 create mode 100644 configs/lx2160ardb_tfa_stmm_defconfig
 create mode 100644 include/mm_communication.h
 create mode 100644 lib/efi_loader/efi_variable_tee.c