Calculate hashes of ssl encryption and decryption keys

Optimize the key switching mechanism to set the key only if 
a different operation is performed with the context.
Signed-off-by: Andrzej Kurek <andrzej.kurek@arm.com>
diff --git a/library/version_features.c b/library/version_features.c
index ec4a692..2ef9d12 100644
--- a/library/version_features.c
+++ b/library/version_features.c
@@ -687,6 +687,9 @@
 #if defined(MBEDTLS_CRC_C)
     "MBEDTLS_CRC_C",
 #endif /* MBEDTLS_CRC_C */
+#if defined(MBEDTLS_VALIDATE_SSL_KEYS_INTEGRITY)
+    "MBEDTLS_VALIDATE_SSL_KEYS_INTEGRITY",
+#endif /* MBEDTLS_VALIDATE_SSL_KEYS_INTEGRITY */
 #if defined(MBEDTLS_VALIDATE_AES_KEYS_INTEGRITY)
     "MBEDTLS_VALIDATE_AES_KEYS_INTEGRITY",
 #endif /* MBEDTLS_VALIDATE_AES_KEYS_INTEGRITY */