[SWDEV-567099] Updated 'amdsmi list --cpu all' command (#2519)

Signed-off-by: Saka, Sitharam Murthy <SitharamMurthy.Saka@amd.com>

projects/amdsmi/amdsmi_cli/amdsmi_commands.py

@@ -227,6 +227,12 @@ class AMDSMICommands():
         if gpu:
             args.gpu = gpu
         
+        cpu_attributes = ["cpu"]
+        for attr in cpu_attributes:
+            if hasattr(args, 'cpu') and getattr(args, 'cpu'):
+                print("N/A")
+                return
+
         # Handle No GPU passed
         if args.gpu == None:
             args.gpu = self.device_handles