rename RPMSetPoint to SetPoint

The PIDs were originally focused on collecting RPM set points from
thermal PIDs and then having fan PIDs use the highest value collected,
it doesn't need to be strictly an RPM set point.

It does however need to be one type of value.

Signed-off-by: Patrick Venture <venture@google.com>
Change-Id: I1d589cf4b2688d7e86030c10496d737dc5bbdadf
diff --git a/pid/zone.hpp b/pid/zone.hpp
index 53139ec..5516bed 100644
--- a/pid/zone.hpp
+++ b/pid/zone.hpp
@@ -28,7 +28,7 @@
     virtual ~ZoneInterface() = default;
 
     virtual double getCachedValue(const std::string& name) = 0;
-    virtual void addRPMSetPoint(double setpoint) = 0;
+    virtual void addSetPoint(double setpoint) = 0;
     virtual void addRPMCeiling(double ceiling) = 0;
     virtual double getMaxRPMRequest() const = 0;
     virtual bool getFailSafeMode() const = 0;
@@ -67,9 +67,9 @@
     void setManualMode(bool mode);
     bool getFailSafeMode(void) const override;
     int64_t getZoneID(void) const;
-    void addRPMSetPoint(double setpoint) override;
+    void addSetPoint(double setpoint) override;
     void addRPMCeiling(double ceiling) override;
-    void clearRPMSetPoints(void);
+    void clearSetPoints(void);
     void clearRPMCeilings(void);
     double getFailSafePercent(void) const override;
     double getMinThermalRPMSetpoint(void) const;
@@ -108,7 +108,7 @@
 
     std::set<std::string> _failSafeSensors;
 
-    std::vector<double> _RPMSetPoints;
+    std::vector<double> _SetPoints;
     std::vector<double> _RPMCeilings;
     std::vector<std::string> _fanInputs;
     std::vector<std::string> _thermalInputs;