Correct styling of Mbed TLS in documentation

Several bits of documentation were incorrectly styling Mbed TLS
as MbedTLS.

Signed-off-by: Thomas Daubney <thomas.daubney@arm.com>

programs/ssl/ssl_context_info.c

@@ -1,5 +1,5 @@
 /*
- *  MbedTLS SSL context deserializer from base64 code
+ *  Mbed TLS SSL context deserializer from base64 code
  *
  *  Copyright The Mbed TLS Contributors
  *  SPDX-License-Identifier: Apache-2.0

tests/scripts/check_names.py

@@ -930,7 +930,7 @@ def main():
             "This script confirms that the naming of all symbols and identifiers "
             "in Mbed TLS are consistent with the house style and are also "
             "self-consistent.\n\n"
-            "Expected to be run from the MbedTLS root directory.")
+            "Expected to be run from the Mbed TLS root directory.")
     )
     parser.add_argument(
         "-v", "--verbose",

tests/src/external_timing/timing_alt.h

@@ -1,5 +1,5 @@
 /*
- * Copy of the internal MbedTLS timing implementation, to be used in tests.
+ * Copy of the internal Mbed TLS timing implementation, to be used in tests.
  */
 /*
  *  Copyright The Mbed TLS Contributors