greybus: Documentation/sysfs: move module 1-4 to position 5

Move example module 1-4 to position 5, effectively renaming it 1-5.

Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>