coverity: stop ignoring delegated attestation

Delegated attestation code is now getting compiled in BL31 on AEM FVP.

Change-Id: Ib12e37e7ec3d0b8e99bd57f8ae8148e48dc3654d
Signed-off-by: Sandrine Bailleux <sandrine.bailleux@arm.com>
1 file changed