make library compile with non MKR boards

[agdl]

I suggest also to have assingnable pins for PIN_USB_HOST_ENABLE and PMIC_IRQ_PIN

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[aliphys]

Hello @facchinm , Is the Arduino_BQ24195 library used for non MKR boards as well? AFAIK, this component is only included in the MKR boards.

[aentinger]

Closing, merged via cmd line since PR repository no longer exists ( c6ad873 ).