Add Changelog.d entry

Signed-off-by: Paul Elliott <paul.elliott@arm.com>
diff --git a/ChangeLog.d/add_psa_m_aead_ccm.txt b/ChangeLog.d/add_psa_m_aead_ccm.txt
new file mode 100644
index 0000000..d7588ee
--- /dev/null
+++ b/ChangeLog.d/add_psa_m_aead_ccm.txt
@@ -0,0 +1,3 @@
+Features
+   * Add the internal implementation of and support for CCM to the PSA multipart
+     AEAD interface.