[SWDEV-489696] Improve AMD SMI Python APIs Functional and Unit Testing (#468)

* Adding python unit tests
* Remove duplicate functions definitions
* Added missing classes for __init__ for py-interface

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Signed-off-by: josnarlo <Joseph.Narlo@amd.com>
Signed-off-by: Maisam Arif <Maisam.Arif@amd.com>

py-interface/amdsmi_interface.py

@@ -207,6 +207,9 @@ class AmdSmiClkType(IntEnum):
     DCLK0 = amdsmi_wrapper.AMDSMI_CLK_TYPE_DCLK0
     DCLK1 = amdsmi_wrapper.AMDSMI_CLK_TYPE_DCLK1
 
+class AmdSmiClkLimitType(IntEnum):
+    MIN = amdsmi_wrapper.CLK_LIMIT_MIN
+    MAX = amdsmi_wrapper.CLK_LIMIT_MAX
 
 class AmdSmiTemperatureType(IntEnum):
     EDGE = amdsmi_wrapper.AMDSMI_TEMPERATURE_TYPE_EDGE