Merge tag 'efi-2022-01-rc4' of https://source.denx.de/u-boot/custodians/u-boot-efi

Pull request for efi-2022-01-rc4

Documentation:

* describe how to enable Virtio RNG on QEMU ARM

UEFI:

* enable testing the TCG2 protocol
* support TPM event log passed from firmware