Merge tag 'efi-2022-04-rc3' of https://source.denx.de/u-boot/custodians/u-boot-efi

Pull request for efi-2022-04-rc3

Documentation:

* add man-page for fatload
* add SMBIOS table page

UEFI:

* partial fix for UEFI secure boot with intermediate certs
* disable watchdog when returning to command line
* reset system after capsule update