qemu-system-arm: add qemu-efi recommends

qemu-efi is needed to boot most aarch64 guest images.

debian/control-in

@@ -249,7 +249,8 @@ Multi-Arch: foreign
 Depends: ${shlibs:Depends}, ${misc:Depends}, qemu-system-common (>> 2.0.0+dfsg-7~)
 Recommends: qemu-utils,
 # aarch64 arm uses bootroms
- ipxe-qemu (>= 1.0.0+git-20131111.c3d1e78-1~)
+ ipxe-qemu (>= 1.0.0+git-20131111.c3d1e78-1~),
+ qemu-efi
 Suggests: samba, vde2, qemu-block-extra (= ${binary:Version}),
 Provides: ${sysprovides:arm}
 Breaks: qemu-system (<< 1.3.0+dfsg-5),