PI piezo driver support#5

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vascotenner wants to merge 4 commits intoawsch:drivers_developfrom

vascotenner:pipiezo

Commits on Jan 2, 2018

Fixed errounous test and changed depricated warn
vascotenner
committed

Commits on Jan 12, 2018

First version of driver for PI piezo driver
vascotenner
committed

Commits on Jan 17, 2018