Tolerate alternative return code for FRU size

202 means 'Cannot return number of request bytes', which is pretty on the nose
for the scenario at hand.  Include that in the conditions to reduce the request size.
Thanks to Rafael Debarros for this.

Change-Id: I833faf2559a93e468748a72db29e6967bc800207

pyghmi/ipmi/fru.py

@@ -160,7 +160,7 @@ class FRU(object):
             response = self.ipmicmd.raw_command(
                 netfn=0xa, command=0x11, data=[fruid, offset & 0xff,
                                                offset >> 8, chunksize])
-            if response['code'] == 201:
+            if response['code'] in (201, 202):
                 # if it was too big, back off and try smaller
                 # Try just over half to mitigate the chance of
                 # one request becoming three rather than just two