Fix missing check on server-chosen curve

We had this check in the non-PSA case, but it was missing in the PSA
case.

Signed-off-by: Manuel Pégourié-Gonnard <manuel.pegourie-gonnard@arm.com>
diff --git a/ChangeLog.d/use-psa-ecdhe-curve.txt b/ChangeLog.d/use-psa-ecdhe-curve.txt
new file mode 100644
index 0000000..cc432bd
--- /dev/null
+++ b/ChangeLog.d/use-psa-ecdhe-curve.txt
@@ -0,0 +1,7 @@
+Bugfix
+   * Fix a bug in (D)TLS curve negotiation: when MBEDTLS_USE_PSA_CRYPTO was
+     enabled and an ECDHE-ECDSA or ECDHE-RSA key exchange was used, the
+     client would fail to check that the curve selected by the server for
+     ECDHE was indeed one that was offered. As a result, the client would
+     accept any curve that it supported, even if that curve was not allowed
+     according to its configuration.