Rename the variable to fix:

  tests/qtest/rtl8139-test.c:28:33: error: declaration shadows a variable in the global scope [-Werror,-Wshadow]
  static void save_fn(QPCIDevice *dev, int devfn, void *data)
                                  ^
  tests/qtest/rtl8139-test.c:37:17: error: declaration shadows a variable in the global scope [-Werror,-Wshadow]
      QPCIDevice *dev;
                  ^
  tests/qtest/rtl8139-test.c:25:20: note: previous declaration is here
  static QPCIDevice *dev;
                     ^

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Message-ID: <20231009100251.56019-7-philmd@linaro.org>
Signed-off-by: Thomas Huth <thuth@redhat.com>