Juno/vexpress/FVP kernel based on latest version of Linux (v4.12)

Changes in this version:
- Add SCMI patches integrated from Sudeep's kernel
  git://git.kernel.org/pub/scm/linux/kernel/git/sudeep.holla/linux.git
  branch: v4.12/scmi
- Add PM_GENERIC_DOMAINS to mach-vexpress/Kconfig
- Add SCMI kernel configs to vexpress64.conf

Issues:
- Mali driver omitted because it doesn't compile with latest Android
  sync APIs