[chassis][lldp] Fix the lldp error log in host instance which doesn't contain front panel ports (#14814) (#15603)

dockers/docker-lldp/lldpmgrd

@@ -23,6 +23,8 @@ try:
     from sonic_py_common import daemon_base
     from swsscommon import swsscommon
     from sonic_py_common.interface import inband_prefix, recirc_prefix
+    from sonic_py_common import device_info
+
 except ImportError as err:
     raise ImportError("%s - required module not found" % str(err))
 
@@ -357,6 +359,7 @@ def run_cmd(self, cmd):
 
 def check_timeout(self, start_time):
     if time.time() - start_time > PORT_INIT_TIMEOUT:
+        if device_info.is_frontend_port_present_in_host():
             self.log_error("Port init timeout reached ({} seconds), resuming lldpd...".format(PORT_INIT_TIMEOUT))
         return True
     return False

src/sonic-py-common/sonic_py_common/device_info.py

@@ -713,3 +713,13 @@ def is_fast_reboot_enabled():
 
     state_db.close(state_db.STATE_DB)
     return fb_enable_state
+
+
+def is_frontend_port_present_in_host():
+    if is_supervisor():
+        return False
+    if is_multi_npu():
+        namespace_id = os.getenv("NAMESPACE_ID")
+        if not namespace_id:
+            return False
+    return True