Add missing import (#12624)

Why I did it
syseepromd in pmon crashes because of missing import in python script and doesn't get in running state

How I did it
Fix missing import issue to avoid python script failing

How to verify it
Boot system and wait till syseepromd gets into running state

Which release branch to backport (provide reason below if selected)
 201811
 201911
 202006
 202012
 202106
 202111
 202205

platform/barefoot/sonic-platform-modules-bfn-montara/sonic_platform/eeprom.py

@@ -4,6 +4,7 @@ try:
     import datetime
     import logging
     import logging.config
+    import thrift
 
     sys.path.append(os.path.dirname(__file__))