Follow up on Todo, move path out of base sensor

Not every sensor needs a sysfs path, because of that
move it out of the base class and into the classes that
need it.

Change-Id: I62b7df681e1ee889eb66e371d1cd6094097e9f21
Signed-off-by: James Feist <james.feist@linux.intel.com>
diff --git a/include/PSUSensor.hpp b/include/PSUSensor.hpp
index afc748b..370ded9 100644
--- a/include/PSUSensor.hpp
+++ b/include/PSUSensor.hpp
@@ -23,6 +23,7 @@
     boost::asio::posix::stream_descriptor inputDev;
     boost::asio::deadline_timer waitTimer;
     boost::asio::streambuf readBuf;
+    std::string path;
     int errCount;
     unsigned int sensorFactor;
     void setupRead(void);