Add build config for PSA FWU support

Added a build config for PSA FWU support.
Also, added the PSA FWU support build option in the coverity script
to analyze the newly created files for FWU support.

Change-Id: I98b0fe05e7686cce45f4ff4e43b4c5d702c959e7
Signed-off-by: Manish V Badarkhe <Manish.Badarkhe@arm.com>
3 files changed