linux-ramdump-parser-v2: Support CONFIG_FAIR_GROUP_SCHED=n

Not all targets run with CONFIG_FAIR_GROUP_SCHED. Adjust the
runqueue parsing to support this.

Change-Id: Ia46826a2d6dd354d1b1f475e6b51c5a9631a39fb

linux-ramdump-parser-v2/parsers/runqueue.py

@@ -55,7 +55,7 @@ class RunQueues(RamParser):
             'struct cfs_rq', 'nr_running')
         my_q_offset = self.ramdump.field_offset('struct sched_entity', 'my_q')
 
-        if se_addr == 0:
+        if se_addr == 0 or my_q_offset is None:
             self.print_task_state(status, se_addr)
         else:
             my_q_addr = self.ramdump.read_word(se_addr + my_q_offset)