Sonoff Ifan02 Support

[thundergreen]

Have you look for this feature in other issues and in the wiki?
yes
Is your feature request related to a problem? Please describe.
A clear and concise description of what the problem is.
I'd like having Ifan working with Home-Assistant
Describe the solution you'd like
A clear and concise description of what you want to happen.
add support for Ifan02
Describe alternatives you've considered
A clear and concise description of any alternative solutions or features you've considered.

Additional context
Add any other context or screenshots about the feature request here.
here the link to the device:

https://www.itead.cc/sonoff-ifan02-wifi-smart-ceiling-fan-with-light.html

(Please, remember to close the issue when the problem has been addressed)

[ascillato]

duplicate issue

please see #2839

thanks