conf change: s/set-point/setpoint/

Remove the dash from set-point, such that it's one word: setpoint.

Change-Id: I4c3033f3c2432a53d850e8f5defbe2ac1510daf8
Signed-off-by: Patrick Venture <venture@google.com>
diff --git a/pid/README b/pid/README
index 7c3f919..7613530 100644
--- a/pid/README
+++ b/pid/README
@@ -3,7 +3,7 @@
 what was published in the Chrome OS source.
 
 One has any number of ThermalControllers that run through a PID step to
-generate a set-point RPM to reach its thermal set-point.  The maximum output
+generate a setpoint RPM to reach its thermal setpoint.  The maximum output
 from the set of ThermalControllers is taken as the input to all the
 FanController PID loops.