SPM: Add build config for FF-M interrupt APIs

Add configs of optionally building FF-M interrupt APIs. Build:
- psa_irq_enable() and psa_irq_disable() for either FLIH or
  SLIH enabled.
- psa_reset_signal() for FLIH enabled.
- psa_eoi() for SLIH enabled.

Signed-off-by: Mingyang Sun <mingyang.sun@arm.com>
Change-Id: I0822f96c1e827181edf34a409b357b7e81485dc4
8 files changed