Prevent repeatedly reading PLDM sensors when proc garded

If a processor was garded, the OCC sensor would never be enabled.
The prior could would continue to try reading a sensor until it became
enabled.
Code change will stop attempting to read a sensor once a signal or valid
response has been received.

Tested on HW

Change-Id: I9c43840fb25803af4f320ae9de00e896daf190f6
Signed-off-by: Chris Cain <cjcain@us.ibm.com>
diff --git a/occ_status.hpp b/occ_status.hpp
index 9ae8fe7..fa9d2d9 100644
--- a/occ_status.hpp
+++ b/occ_status.hpp
@@ -201,6 +201,25 @@
      */
     CmdStatus sendAmbient(const uint8_t ambient = 0xFF,
                           const uint16_t altitude = 0xFFFF);
+
+    /** @brief Set flag indicating if PLDM sensor has been received
+     *
+     *  @param[in] wasReceived - true if PLDM sensor was read
+     */
+    void setPldmSensorReceived(const bool wasReceived)
+    {
+        pldmSensorStateReceived = wasReceived;
+    }
+
+    /** @brief Read flag indicating if PLDM sensor has been read
+     *
+     *  @return true if sensor has been read
+     */
+    bool getPldmSensorReceived()
+    {
+        return pldmSensorStateReceived;
+    }
+
 #endif // POWER10
 
     /** @brief Return the HWMON path for this OCC
@@ -266,6 +285,9 @@
     /** @brief hwmon path for this OCC */
     fs::path hwmonPath;
 
+    /** @brief flag indicating if the OCC sensor has been received */
+    bool pldmSensorStateReceived = false;
+
     /** @brief Callback function on host control signals
      *
      *  @param[in]  msg - Data associated with subscribed signal