Merge tag 'efi-2022-10-rc4' of https://source.denx.de/u-boot/custodians/u-boot-efi

Pull request for efi-2022-10-rc4

Documentation:

* add a page on sending patches
* bindings for FWU Metadata mtd storage
* fpio status output fields description

UEFI:

* ensure all block devices are probed