1.10 hardware.ino contains #include <my92xx.h>

Originally reported by: **Marco de Gier (Bitbucket: [DiGierre](https://bitbucket.org/DiGierre), GitHub: Unknown)**

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1.10 source code. hardware.ino contains a 'hard' #include <my92xx.h> in line 16. When not needed (e.g. setting sonoff basic in arduino.h) & when the library is not installed this causes compilation error in arduino IDE.