[SWDEV-530633] Use gpu_metric speed and BW for xgmi (#366)

The xgmi command was showing pcie bit rate and bandwidth instead of xgmi. Corrected the API to get xgmi data from gpu metric.
Added python API for amdsmi_get_link_metrics. Modified the amdsmi_link_metrics struct.
Added check to confirm non zero partition got xgmi command.

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Signed-off-by: Bindhiya Kanangot Balakrishnan <Bindhiya.KanangotBalakrishnan@amd.com>
Signed-off-by: Maisam Arif <Maisam.Arif@amd.com>

include/amd_smi/amdsmi.h

@@ -967,14 +967,14 @@ typedef struct {
  * @cond @tag{gpu_bm_linux} @endcond
  */
 typedef struct {
-    uint32_t num_links;  //!< number of links
+    uint32_t num_links;     //!< number of links
+    uint32_t bit_rate;      //!< current link speed in Gb/s
+    uint32_t max_bandwidth; //!< max bandwidth of the link in Gb/s
     struct _links {
-        amdsmi_bdf_t bdf;
-        uint32_t bit_rate;             //!< current link speed in Gb/s
-        uint32_t max_bandwidth;        //!< max bandwidth of the link in Gb/s
-        amdsmi_link_type_t link_type;  //!< type of the link
-        uint64_t read;                 //!< total data received for each link in KB
-        uint64_t write;                //!< total data transfered for each link in KB
+        amdsmi_bdf_t bdf;               //!< bdf of the destination gpu
+        amdsmi_link_type_t link_type;   //!< type of the link
+        uint64_t read;                  //!< total data received for each link in KB
+        uint64_t write;                 //!< total data transfered for each link in KB
         uint64_t reserved[2];
     } links[AMDSMI_MAX_NUM_XGMI_PHYSICAL_LINK];
     uint64_t reserved[7];