Bug#773533: efivarfs not mounted by default

[Leif Lindholm]

Package: systemd
Severity: normal

The efivarfs kernel module is built for all UEFI-capable platforms
(i386, amd64, arm64), but since systemd is build with --disable-efi,
the filesystem is not mounted at boot-time on
/sys/firmware/efi/efivars.

This makes the efivars package (used by commands like efibootmgr) fall
back to the legacy "efivars" interface (/sys/firmware/efi/vars), which
suffers from various limitations - the most obvious one being a hard
limit on 1024 bytes on any variable.

Could we build systemd without --disable-efi, please?