[powerpc] Collect nvdimm logs

Run an opal-prd command to collect nvdimm NV DIMM info which includes:

- Number of NV DIMMs
- Active slot
- Falsh lifetime
- Serial Number
- Runtime

The data generated by the opal-prd for NV DIMM info command is usually
around 1K.

Signed-off-by: Sourabh Jain <[email protected]>

sos/report/plugins/powerpc.py

@@ -115,6 +115,9 @@ def setup(self):
                 "/var/log/opal-prd",
                 "/var/log/opal-prd.log*"
             ])
+            self.add_cmd_output([
+                "opal-prd --expert-mode run nvdimm_info"
+            ])
             if self.path_isdir("/var/log/dump"):
                 self.add_cmd_output("ls -l /var/log/dump")