arm-bsp: Add trusted firmware support for N1SDP

- Add new bbappend to fetch tfa ver 2.2 required for N1SDP
- Apply additional patch required for N1SDP
- Update machine conf to add image dependency for
  trusted firmware component

Issue-Id: PLATFORMS-3134
Change-Id: Ibf593c1818c9ea08acf71c6b5b80abc4aca79723
Signed-off-by: Khasim Syed Mohammed <khasim.mohammed@arm.com>
Signed-off-by: Jon Mason <jon.mason@arm.com>