Merge tag 'efi-2022-04-rc2-4' of https://source.denx.de/u-boot/custodians/u-boot-efi

Pull request for efi-2022-04-rc2-4

Documentation:

* mkeficapsule man-page

UEFI changes:

* add support for signing images to mkeficapsule
* add support for user define capsule GUID
* adjust unit tests for capsules
* fix UEFI image signature validation in case of multiple signatures

diff --cc scripts/pylint.base
index e84ae52cbe9f5711e0af4a55344c0f9eb63a8e57,7e25108b83c09839837392a81ec7d14e501376d8..9f199dc712180df5045c9ca88f8824dca8b2484e
--- 1/scripts/pylint.base
--- 2/scripts/pylint.base
+++ b/scripts/pylint.base
@@@ -9,15 -9,15 +9,16 @@@ test_tests_test_bind.py -2.9
  test_tests_test_button.py 3.33
  test_tests_test_dfu.py 5.45
  test_tests_test_dm.py 9.52
--test_tests_test_efi_capsule_capsule_defs.py 5.00
--test_tests_test_efi_capsule_conftest.py 1.88
--test_tests_test_efi_capsule_test_capsule_firmware.py 3.89
++test_tests_test_efi_capsule_capsule_defs.py 6.67
++test_tests_test_efi_capsule_conftest.py 1.86
++test_tests_test_efi_capsule_test_capsule_firmware.py 4.52
++test_tests_test_efi_capsule_test_capsule_firmware_signed.py 4.85
  test_tests_test_efi_fit.py 8.16
  test_tests_test_efi_loader.py 7.38
  test_tests_test_efi_secboot_conftest.py -3.29
  test_tests_test_efi_secboot_defs.py 6.67
  test_tests_test_efi_secboot_test_authvar.py 8.93
--test_tests_test_efi_secboot_test_signed.py 8.38
++test_tests_test_efi_secboot_test_signed.py 8.41
  test_tests_test_efi_secboot_test_signed_intca.py 8.10
  test_tests_test_efi_secboot_test_unsigned.py 8.00
  test_tests_test_efi_selftest.py 6.36