CSR SiRFprimaII and SiRFmarco device tree bindings.
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Required root node properties:
    - compatible:
    - "sirf,atlas6-cb" : atlas6 "cb" evaluation board
    - "sirf,atlas6" : atlas6 device based board
    - "sirf,atlas7-cb" : atlas7 "cb" evaluation board
    - "sirf,atlas7" : atlas7 device based board
    - "sirf,prima2-cb" : prima2 "cb" evaluation board
    - "sirf,prima2" : prima2 device based board
