Rename constant-time functions to have mbedtls_ct prefix

Rename functions to better suite with the module name.

Signed-off-by: Gabor Mezei <gabor.mezei@arm.com>
diff --git a/tests/suites/test_suite_ssl.function b/tests/suites/test_suite_ssl.function
index 5623a1c..6b3658f 100644
--- a/tests/suites/test_suite_ssl.function
+++ b/tests/suites/test_suite_ssl.function
@@ -4555,7 +4555,7 @@
 void ssl_cf_hmac( int hash )
 {
     /*
-     * Test the function mbedtls_cf_hmac() against a reference
+     * Test the function mbedtls_ct_hmac() against a reference
      * implementation.
      */
     mbedtls_md_context_t ctx, ref_ctx;
@@ -4614,7 +4614,7 @@
 
             /* Get the function's result */
             TEST_CF_SECRET( &in_len, sizeof( in_len ) );
-            TEST_EQUAL( 0, mbedtls_cf_hmac( &ctx, add_data, sizeof( add_data ),
+            TEST_EQUAL( 0, mbedtls_ct_hmac( &ctx, add_data, sizeof( add_data ),
                                             data, in_len,
                                             min_in_len, max_in_len,
                                             out ) );
@@ -4664,7 +4664,7 @@
         mbedtls_test_set_step( (int) secret );
 
         TEST_CF_SECRET( &secret, sizeof( secret ) );
-        mbedtls_cf_memcpy_offset( dst, src, secret,
+        mbedtls_ct_memcpy_offset( dst, src, secret,
                                   offset_min, offset_max, len );
         TEST_CF_PUBLIC( &secret, sizeof( secret ) );
         TEST_CF_PUBLIC( dst, len );