[pcied] Fix pcied failure to load due to 'pcied NameError: name 'self…

…' is not defined' (#198)

Fix sonic-net/sonic-buildimage#7993

- Fixes wrong log line when Pcie module does not exists that causes the pcied daemon to enter FATAL state.
- Change log level of line "Failed to load platform Pcie module" to notice since this is not an error flow, this is part of the normal loading flow we expect when a vendor didn't supply a Pcie class.

sonic-pcied/scripts/pcied

@@ -10,7 +10,7 @@ import signal
 import sys
 import threading
 
-from sonic_py_common import daemon_base, device_info
+from sonic_py_common import daemon_base, device_info, logger
 from swsscommon import swsscommon
 
 #
@@ -35,6 +35,8 @@ PCIEUTIL_LOAD_ERROR = 2
 
 platform_pcieutil = None
 
+log = logger.Logger(SYSLOG_IDENTIFIER)
+
 exit_code = 0
 
 # wrapper functions to call the platform api
@@ -45,12 +47,12 @@ def load_platform_pcieutil():
         from sonic_platform.pcie import Pcie
         _platform_pcieutil = Pcie(platform_path)
     except ImportError as e:
-        self.log_error("Failed to load platform Pcie module. Error : {}".format(str(e)), True)
+        log.log_notice("Failed to load platform Pcie module. Error : {}, Fallback to default module".format(str(e)), True)
         try:
             from sonic_platform_base.sonic_pcie.pcie_common import PcieUtil
             _platform_pcieutil = PcieUtil(platform_path)
         except ImportError as e:
-            self.log_error("Failed to load default PcieUtil module. Error : {}".format(str(e)), True)
+            log.log_error("Failed to load default PcieUtil module. Error : {}".format(str(e)), True)
     return _platform_pcieutil
 
 def read_id_file(device_name):