Merge tag 'efi-2021-01-rc5-2' of https://gitlab.denx.de/u-boot/custodians/u-boot-efi

Pull request for UEFI sub-system for efi-2021-01-rc5 (2)

The following errors in the UEFI sub-system are fixed:

* use after free in efi_exit()
* invalid free when using the boot manager
* pressing escape key once not recognized