TinyCrypt SSL: Extend scope of use of TC in PMS derivation

Extend scope of TC in ECDH-param extraction from CRT

Previously, TinyCrypt was only used for ECDHE-ECDSA/RSA ciphersuites.
This commit is a step towards using it for _all_ ciphersuites involving
ECDHE (specifically: ECDHE, ECDHE-PSK, static ECDH), extending the scope
of the use of TinyCrypt in the assembly of the PMS.
diff --git a/library/ssl_tls.c b/library/ssl_tls.c
index 2e8a076..75d199a 100644
--- a/library/ssl_tls.c
+++ b/library/ssl_tls.c
@@ -1952,9 +1952,13 @@
 
 #if defined(MBEDTLS_USE_TINYCRYPT)
     if( mbedtls_ssl_suite_get_key_exchange( ciphersuite_info )
-        == MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA ||
+        == MBEDTLS_KEY_EXCHANGE_ECDHE_RSA                       ||
         mbedtls_ssl_suite_get_key_exchange( ciphersuite_info )
-        == MBEDTLS_KEY_EXCHANGE_ECDHE_RSA )
+        == MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA                     ||
+        mbedtls_ssl_suite_get_key_exchange( ciphersuite_info )
+        == MBEDTLS_KEY_EXCHANGE_ECDH_RSA                        ||
+        mbedtls_ssl_suite_get_key_exchange( ciphersuite_info )
+        == MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA )
     {
         const struct uECC_Curve_t * uecc_curve = uECC_secp256r1();
         ((void) ret);