The pull request at https://gitee.com/src-openeuler/grub2/pulls/468
added efisecret.mod to the grub2-efi-x64-modules package. Based on this
package, we can build OVMF.fd using AmdSevX64.dsc to support booting a
VM with full disk encryption.
Signed-off-by: hanliyang <hanliyang@hygon.cn>
