Replace PTR_EQ checks with the more idiomatic and specific NULL macros.
Acked-by: NDaniel Latypov <dlatypov@google.com>
Signed-off-by: NRicardo Ribalda <ribalda@chromium.org>
Acked-by: NBrendan Higgins <brendanhiggins@google.com>
Signed-off-by: NShuah Khan <skhan@linuxfoundation.org>