dcc_parser: Fix DCC parsing for older DCC version

Write indicator flag for DCC is not initialized for older
driver version of DCC resulting in the parser bailing out
early. Initialize the flag to None.

Change-Id: Ifa7e19f1484b1d9905e35200b3ce333fc9ded2f3

dcc_parser/dcc_parser.py

@@ -75,6 +75,7 @@ def read_config(config_pt):
         link_descriptor = 0
         loop_descriptor = None
         rd_mod_wr_descriptor = None
+        dcc_write_ind = None
         link_second_arg = 8
         # We return zero and fail
         on_zero_link_len = 0