The PowerMac9,1 has 4 sensors on its smu(4), so increase the maximum number. Also add a check for the maximum number of sensors like we already have for the number of fans such that we avoid mysterious hangs on machines with more than 4 sensors.
The PowerMac9,1 has 4 sensors on its smu(4), so increase the maximum number.
Also add a check for the maximum number of sensors like we already have for
the number of fans such that we avoid mysterious hangs on machines with
more than 4 sensors.

orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars