RFR: JDK-8058577 - dio.properties-raspberrypi should only include currently supported devices

[Jen Dority]

issue: https://bugs.openjdk.java.net/browse/JDK-8058577
webrev: http://cr.openjdk.java.net/~jld/8058577/

Hi All,

Need a review for a trivial changeset. This changeset strips out 
not-yet-supported devices from the sample raspberry pi dio.properties file.


Thanks,
Jen