changelog: add changelog for move of mbedtls_ecc psa helper functions

add changelog for move of mbedtls_ecc psa helper functions.

Signed-off-by: Joakim Andersson <joakim.andersson@nordicsemi.no>
diff --git a/ChangeLog.d/move-mbedtls-ecc-psa-helpers.txt b/ChangeLog.d/move-mbedtls-ecc-psa-helpers.txt
new file mode 100644
index 0000000..85d970c
--- /dev/null
+++ b/ChangeLog.d/move-mbedtls-ecc-psa-helpers.txt
@@ -0,0 +1,3 @@
+Changes
+    * Moved declaration of functions mbedtls_ecc_group_to_psa and
+      mbedtls_ecc_group_of_psa from psa/crypto_extra.h to mbedtls/psa_util.h