Merge tag 'efi-2021-10-rc1-2' of https://source.denx.de/u-boot/custodians/u-boot-efi

Pull request for efi-2021-10-rc1-2

* Correct device path nodes for GUID partitions
* Embed keys to check update capsules instead of providing then in DTB
* Increase event log buffer size for measured boot.