Merge tag 'efi-2023-10-rc2-2' of https://source.denx.de/u-boot/custodians/u-boot-efi

Merge tag 'efi-2023-10-rc2-2' of https://source.denx.de/u-boot/custodians/u-boot-efi

Pull request efi-2023-10-rc2-2

Documentation:

* Move README.falcon to HTML
* Describe usage of QEMU virtio block device
* Add SPDX license identifiers to svg images
* Add more detail to the description of U-Boot boot phases

UEFI:

* Fix buffer overflows
* Fix memory leak in efi_add_memory_map_pg
* Properly check return values of calloc, uuid_str_to_bin,
  efi_parse_pkcs7_header