tests/functional/test_mips_malta: Fix comment about endianness of the test

This test is for the big endian MIPS target, not for the little endian
target.

Signed-off-by: Thomas Huth <thuth@redhat.com>
Fixes: 79cb4a14cb6 ("tests/functional: Convert mips32eb 4Kc Malta tests")
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Michael Tokarev <mjt@tls.msk.ru>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>

tests/functional/test_mips_malta.py

@@ -1,6 +1,6 @@
 #!/usr/bin/env python3
 #
-# Functional tests for the little-endian 32-bit MIPS Malta board
+# Functional tests for the big-endian 32-bit MIPS Malta board
 #
 # Copyright (c) Philippe Mathieu-Daudé <f4bug@amsat.org>
 #