Return the driver loading status

When init the library, it could return status whether the driver is
loaded or not.

Change-Id: Id26b8058e32881ebe2514067a639a2a871d1f252

include/amd_smi/amdsmi.h

@@ -178,6 +178,7 @@ typedef enum {
     AMDSMI_STATUS_NOT_FOUND = 31,  //!< Device Not found
     AMDSMI_STATUS_NOT_INIT = 32,  //!< Device not initialized
     AMDSMI_STATUS_NO_SLOT = 33,  //!< No more free slot
+    AMDSMI_STATUS_DRIVER_NOT_LOADED = 34,  //!< Processor driver not loaded
     // Data and size errors
     AMDSMI_STATUS_NO_DATA = 40,  //!< No data was found for a given input
     AMDSMI_STATUS_INSUFFICIENT_SIZE = 41,  //!< Not enough resources were available for the operation