analyzer: move common to artiq.protocols

migen was still pulled in through rtio.__init__.py

artiq/coredevice/analyzer.py

@@ -4,7 +4,7 @@ from itertools import count
 import struct
 import logging
 
-from artiq.gateware.rtio.analyzer_common import MessageType, ExceptionType
+from artiq.protocols.analyzer import MessageType, ExceptionType
 
 
 logger = logging.getLogger(__name__)

artiq/gateware/rtio/analyzer.py

@@ -3,7 +3,7 @@ from migen.genlib.record import Record, layout_len
 from misoc.interconnect.csr import *
 from misoc.interconnect import stream
 
-from artiq.gateware.rtio.analyzer_common import MessageType, ExceptionType
+from artiq.protocols.analyzer import MessageType, ExceptionType
 
 
 __all__ = ["Analyzer"]