[rocm-smi-lib] add HBM temperature conversion factor

Change-Id: I45339c87c3d2a40670baf1b76ada60dceb650dc0

include/rocm_smi/rocm_smi.h

@@ -838,6 +838,9 @@ struct metrics_table_header_t {
 // This should match NUM_HBM_INSTANCES
 #define RSMI_NUM_HBM_INSTANCES 4
 
+// Unit conversion factor for HBM temperatures
+#define CENTRIGRADE_TO_MILLI_CENTIGRADE 1000
+
 typedef struct {
   // TODO(amd) Doxygen documents
   /// \cond Ignore in docs.