p/fuel: salt-formulas: Enable Armband formula

p/fuel: salt-formulas: Enable Armband formula

FIXME: Re-enable apparmor.
FIXME: Detect baremetal and re-enable acceleration.

Based on old Armband Fuel patches:
- install qemu-efi;
- install vgabios;
- disable apparmor as security driver for libvirt (temporary);
- fix missing link for vgabios binary blob;
- nova: virt_type=qemu (temporary, until we support baremetal too);
- nova: pointer_model=ps2mouse since AArch64 has no USB tablet;
- nova: cpu_model=cortex-a57;
- nova: libvirt driver: Add ttyAMA0 by default on AArch64;
- nova: libvirt driver: Use VGA video type by default on AArch64;

Change-Id: I6aa87ac8d1c2f9fe3919b80fd29ab84ccfaa7c38
Signed-off-by: Guillermo Herrero <Guillermo.Herrero@enea.com>
Signed-off-by: Charalampos Kominos <Charalampos.Kominos@enea.com>
Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>