Mitsubishi Mini-Split model to add to device code list (code 1129)

[Eilermoon]

Hello! I just wanted to add a model to include in the climate code list. I have a Mitsubishi MSZ-EF12NAW and am using code 1129 with it successfully! That code is currently listed to work with MSZ-GE22VA, MSZ-EF35VE, MSZ-GL*NA, but not the one I stated I'm using above.

[trisk]

Please edit CLIMATE.md and create a PR.