tests: Add mbedtls_test_ prefix to *hexify functions

Add mbedtls_test_ prefix to hexify() and unhexify()
test helper functions.

Command to change *.function files:
find . -name "*.function" -exec awk -i inplace \
    '{sub(/(un|)hexify\>/,"mbedtls_test_&")}1' {} \;

Signed-off-by: Ronald Cron <ronald.cron@arm.com>
diff --git a/tests/suites/test_suite_chachapoly.function b/tests/suites/test_suite_chachapoly.function
index 8e56bf6..aeaf1d74 100644
--- a/tests/suites/test_suite_chachapoly.function
+++ b/tests/suites/test_suite_chachapoly.function
@@ -33,12 +33,12 @@
     memset( output_str, 0x00, sizeof( output_str ) );
     memset( mac_str,    0x00, sizeof( mac_str ) );
 
-    aad_len    = unhexify( aad_str,    hex_aad_string    );
-    input_len  = unhexify( input_str,  hex_input_string  );
-    output_len = unhexify( output_str, hex_output_string );
-    key_len    = unhexify( key_str,    hex_key_string    );
-    nonce_len  = unhexify( nonce_str,  hex_nonce_string  );
-    mac_len    = unhexify( mac_str,    hex_mac_string    );
+    aad_len    = mbedtls_test_unhexify( aad_str,    hex_aad_string    );
+    input_len  = mbedtls_test_unhexify( input_str,  hex_input_string  );
+    output_len = mbedtls_test_unhexify( output_str, hex_output_string );
+    key_len    = mbedtls_test_unhexify( key_str,    hex_key_string    );
+    nonce_len  = mbedtls_test_unhexify( nonce_str,  hex_nonce_string  );
+    mac_len    = mbedtls_test_unhexify( mac_str,    hex_mac_string    );
 
     TEST_ASSERT( key_len   == 32 );
     TEST_ASSERT( nonce_len == 12 );
@@ -87,12 +87,12 @@
     memset( output_str, 0x00, sizeof( output_str ) );
     memset( mac_str,    0x00, sizeof( mac_str ) );
 
-    aad_len    = unhexify( aad_str,    hex_aad_string    );
-    input_len  = unhexify( input_str,  hex_input_string  );
-    output_len = unhexify( output_str, hex_output_string );
-    key_len    = unhexify( key_str,    hex_key_string    );
-    nonce_len  = unhexify( nonce_str,  hex_nonce_string  );
-    mac_len    = unhexify( mac_str,    hex_mac_string    );
+    aad_len    = mbedtls_test_unhexify( aad_str,    hex_aad_string    );
+    input_len  = mbedtls_test_unhexify( input_str,  hex_input_string  );
+    output_len = mbedtls_test_unhexify( output_str, hex_output_string );
+    key_len    = mbedtls_test_unhexify( key_str,    hex_key_string    );
+    nonce_len  = mbedtls_test_unhexify( nonce_str,  hex_nonce_string  );
+    mac_len    = mbedtls_test_unhexify( mac_str,    hex_mac_string    );
 
     TEST_ASSERT( key_len   == 32 );
     TEST_ASSERT( nonce_len == 12 );