psa: Add psa_crypto_aead.[hc]

Signed-off-by: Ronald Cron <ronald.cron@arm.com>
diff --git a/library/CMakeLists.txt b/library/CMakeLists.txt
index 220fbf9..256feef 100644
--- a/library/CMakeLists.txt
+++ b/library/CMakeLists.txt
@@ -63,6 +63,7 @@
     platform_util.c
     poly1305.c
     psa_crypto.c
+    psa_crypto_aead.c
     psa_crypto_cipher.c
     psa_crypto_client.c
     psa_crypto_driver_wrappers.c