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/test/pid_thermalcontroller_unittest.cpp b/test/pid_thermalcontroller_unittest.cpp
index ae5c769..d95f16e 100644
--- a/test/pid_thermalcontroller_unittest.cpp
+++ b/test/pid_thermalcontroller_unittest.cpp
@@ -99,7 +99,7 @@
     EXPECT_FALSE(p == nullptr);
 
     double value = 90.0;
-    EXPECT_CALL(z, addRPMSetPoint(value));
+    EXPECT_CALL(z, addSetPoint(value));
 
     p->outputProc(value);
 }
@@ -170,7 +170,7 @@
         .WillOnce(Return(9.0))
         .WillOnce(Return(7.0));
 
-    EXPECT_CALL(z, addRPMSetPoint(_)).Times(3);
+    EXPECT_CALL(z, addSetPoint(_)).Times(3);
 
     std::vector<double> lastReadings = {12.0, 12.0, 7.0};
     for (auto& reading : lastReadings)
@@ -203,7 +203,7 @@
         .WillOnce(Return(13.0))
         .WillOnce(Return(14.0));
 
-    EXPECT_CALL(z, addRPMSetPoint(_)).Times(3);
+    EXPECT_CALL(z, addSetPoint(_)).Times(3);
 
     std::vector<double> lastReadings = {8.0, 8.0, 14.0};
     for (auto& reading : lastReadings)