ssl_tls: fix guards for accelerated ECDH

Signed-off-by: Valerio Setti <valerio.setti@nordicsemi.no>
diff --git a/include/mbedtls/config_psa.h b/include/mbedtls/config_psa.h
index cedce1e..d0c24d8 100644
--- a/include/mbedtls/config_psa.h
+++ b/include/mbedtls/config_psa.h
@@ -853,6 +853,11 @@
 #define PSA_HAVE_FULL_JPAKE 1
 #endif
 
+#if defined(PSA_WANT_ALG_ECDH) && defined(PSA_WANT_KEY_TYPE_ECC_KEY_PAIR) && \
+    defined(PSA_WANT_KEY_TYPE_ECC_PUBLIC_KEY)
+#define PSA_HAVE_FULL_ECDH 1
+#endif
+
 /* These features are always enabled. */
 #define PSA_WANT_KEY_TYPE_DERIVE 1
 #define PSA_WANT_KEY_TYPE_PASSWORD 1