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_mdx.function b/tests/suites/test_suite_mdx.function
index 02004ef..b6c8d8d 100644
--- a/tests/suites/test_suite_mdx.function
+++ b/tests/suites/test_suite_mdx.function
@@ -20,7 +20,7 @@
     ret = mbedtls_md2_ret( src_str, strlen( (char *) src_str ), output );
     TEST_ASSERT( ret == 0 ) ;
 
-    TEST_ASSERT( hexcmp( output, hex_hash_string->x, sizeof  output, hex_hash_string->len ) == 0 );
+    TEST_ASSERT( mbedtls_test_hexcmp( output, hex_hash_string->x, sizeof  output, hex_hash_string->len ) == 0 );
 }
 /* END_CASE */
 
@@ -39,7 +39,7 @@
     ret = mbedtls_md4_ret( src_str, strlen( (char *) src_str ), output );
     TEST_ASSERT( ret == 0 );
 
-    TEST_ASSERT( hexcmp( output, hex_hash_string->x, sizeof  output, hex_hash_string->len ) == 0 );
+    TEST_ASSERT( mbedtls_test_hexcmp( output, hex_hash_string->x, sizeof  output, hex_hash_string->len ) == 0 );
 }
 /* END_CASE */
 
@@ -58,7 +58,7 @@
     ret = mbedtls_md5_ret( src_str, strlen( (char *) src_str ), output );
     TEST_ASSERT( ret == 0 );
 
-    TEST_ASSERT( hexcmp( output, hex_hash_string->x, sizeof  output, hex_hash_string->len ) == 0 );
+    TEST_ASSERT( mbedtls_test_hexcmp( output, hex_hash_string->x, sizeof  output, hex_hash_string->len ) == 0 );
 }
 /* END_CASE */
 
@@ -77,7 +77,7 @@
     ret = mbedtls_ripemd160_ret( src_str, strlen( (char *) src_str ), output );
     TEST_ASSERT( ret == 0 );
 
-    TEST_ASSERT( hexcmp( output, hex_hash_string->x, sizeof output, hex_hash_string->len ) == 0 );
+    TEST_ASSERT( mbedtls_test_hexcmp( output, hex_hash_string->x, sizeof output, hex_hash_string->len ) == 0 );
 }
 /* END_CASE */