tests: Add mbedtls_test_ prefix to hexcmp()

Add mbedtls_test_ prefix to hexcmp() test helper
function.

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

Signed-off-by: Ronald Cron <ronald.cron@arm.com>
diff --git a/tests/suites/test_suite_pkcs1_v21.function b/tests/suites/test_suite_pkcs1_v21.function
index 7b8087b..c3ac92f 100644
--- a/tests/suites/test_suite_pkcs1_v21.function
+++ b/tests/suites/test_suite_pkcs1_v21.function
@@ -37,7 +37,7 @@
     TEST_ASSERT( mbedtls_rsa_pkcs1_encrypt( &ctx, &rnd_buffer_rand, &info, MBEDTLS_RSA_PUBLIC, message_str->len, message_str->x, output ) == result );
     if( result == 0 )
     {
-        TEST_ASSERT( hexcmp( output, result_hex_str->x, ctx.len, result_hex_str->len ) == 0 );
+        TEST_ASSERT( mbedtls_test_hexcmp( output, result_hex_str->x, ctx.len, result_hex_str->len ) == 0 );
     }
 
 exit:
@@ -93,7 +93,7 @@
                                                 sizeof( output ) ) == result );
         if( result == 0 )
         {
-            TEST_ASSERT( hexcmp( output, result_hex_str->x, output_len, result_hex_str->len ) == 0 );
+            TEST_ASSERT( mbedtls_test_hexcmp( output, result_hex_str->x, output_len, result_hex_str->len ) == 0 );
         }
     }
 
@@ -146,7 +146,7 @@
     if( result == 0 )
     {
 
-        TEST_ASSERT( hexcmp( output, result_hex_str->x, ctx.len, result_hex_str->len ) == 0 );
+        TEST_ASSERT( mbedtls_test_hexcmp( output, result_hex_str->x, ctx.len, result_hex_str->len ) == 0 );
     }
 
 exit: