Turn leds off in the event of host suspend/shutdown

In case if host goes to suspend/hibernate/shutdown modes, turn off
leds in FW.
N.B. for some host platforms intercepting suspend is not easy task,
well if ever possible (i.e Linux), so turn off leds in Lightpack FW,
when USB device is not yet/already configured.
Firmware version 7.6
Merge remote-tracking branch 'origin/e-yes_and_suspend_for_all'