Merge changes from topic "od/ns-interrupts"

* changes:
  Cactus: enable managed exit for primary cactus
  SPM: test handling of non-secure interrupt while running SP
  Cactus: helper commands needed for interrupt testing
  Cactus: add handler from managed exit FIQ interrupt
  Cactus: make ffa_id global
  Cactus: implement hvc call to enable an interrupt
  Cactus: decouple exception handling from tftf framework
  spmc: hypervisor calls moved to a separate module