[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>

py-interface/__init__.py

@@ -221,6 +221,7 @@ from .amdsmi_interface import amdsmi_get_gpu_subsystem_name
 from .amdsmi_interface import amdsmi_topo_get_numa_node_number
 from .amdsmi_interface import amdsmi_topo_get_link_weight
 from .amdsmi_interface import amdsmi_get_minmax_bandwidth_between_processors
+from .amdsmi_interface import amdsmi_get_link_metrics
 from .amdsmi_interface import amdsmi_topo_get_link_type
 from .amdsmi_interface import amdsmi_topo_get_p2p_status
 from .amdsmi_interface import amdsmi_is_P2P_accessible