Replace references to Mbed Crypto with Mbed TLS through-out documentation and comments.

Signed-off-by: Fredrik Hesse <fredrik@hesse.se>
diff --git a/include/psa/crypto_compat.h b/include/psa/crypto_compat.h
index 5cb225b..24239f5 100644
--- a/include/psa/crypto_compat.h
+++ b/include/psa/crypto_compat.h
@@ -5,7 +5,7 @@
  *
  * This header declares alternative names for macro and functions.
  * New application code should not use these names.
- * These names may be removed in a future version of Mbed Crypto.
+ * These names may be removed in a future version of Mbed TLS.
  *
  * \note This file may not be included directly. Applications must
  * include psa/crypto.h.