Merge tag 'efi-2021-07-rc5' of https://source.denx.de/u-boot/custodians/u-boot-efi

Pull request for efi-2021-07-rc5

Documentation:

* pinmux and ums man-page

Bug fixes:

* Consider that partition numbers as hexadecimal.
* Avoid a possible NULL dereference in efi_capsule_delete_file().