Build: Fix IAR build when TFM_EXCEPTION_INFO_DUMP=ON

IAR build fails if TFM_EXCEPTION_INFO_DUMP=ON is
defined. Added the missing IAR specific pragma
which solved the issue.

Signed-off-by: Dávid Házi <david.hazi@arm.com>
Change-Id: I1e92f05d6e9d7fecaedcb2b762ead09eb9a4ef99
12 files changed