SWDEV-475244 - Memory Usage and Bandwidth: memory activity

Implemented memory activity and added a new fied id
RDC_FI_GPU_MEMORY_ACTIVITY.

Signed-off-by: Li Ma <li.ma@amd.com>
Change-Id: I11abe356ef6b01ce4917fd19dcc128efbc535f39

include/rdc/rdc.h

@@ -187,6 +187,7 @@ typedef enum {
   RDC_FI_GPU_MEMORY_TOTAL,  //!< Total memory of the GPU instance
   RDC_FI_GPU_MM_ENC_UTIL,  //!< Multimedia encoder busy percentage
   RDC_FI_GPU_MM_DEC_UTIL,  //!< Multimedia decoder busy percentage
+  RDC_FI_GPU_MEMORY_ACTIVITY,  //!< Memory busy percentage
 
   /**
    * @brief ECC related fields