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 --git a/scripts/pylint.base b/scripts/pylint.base
index e84ae52c..9f199dc 100644
--- a/scripts/pylint.base
+++ b/scripts/pylint.base
@@ -9,15 +9,16 @@
 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