Patch to rectify the attribute decode issue.

This patch includes the fix for "ERROR: 'CmdResult' object has no
attribute 'decode'".

Signed-off-by: Shaik Abdulla <[email protected]>

avocado/utils/network/interfaces.py

@@ -836,7 +836,7 @@ def get_device_IPI_name(self):
                 f"cat /sys/class/net/{self.name}/device/devspec | "
                 f"awk -F/ '{{print $3}}'"
             )
-            interface_type = process.run(cmd, shell=True, ignore_status=True).decode(
+            interface_type = process.system_output(cmd, shell=True, ignore_status=True).decode(
                 "utf-8"
             )
             cmd = f"echo {interface_type} | sed 's/@/-/' "