Fix pycodestyle issues

osmo-sim-auth.py:45:12: E711 comparison to None should be 'if cond is None:'
osmo-sim-auth.py:131:20: E712 comparison to True should be 'if cond is True:' or 'if cond:'

Change-Id: I959ea84b8369a0a37bb65c47824a4c4e8d4630cc
diff --git a/osmo-sim-auth.py b/osmo-sim-auth.py
index e05c384..f668dd4 100755
--- a/osmo-sim-auth.py
+++ b/osmo-sim-auth.py
@@ -42,7 +42,7 @@
 
     print("\nUMTS Authentication")
     ret = u.authenticate(rand_bin, autn_bin, ctx='3G')
-    if ret == None:
+    if ret is None:
         print("UMTS Authentication failed")
         exit(1)
     if len(ret) == 1:
@@ -128,7 +128,7 @@
     if options.autn:
         autn_bin = stringToByte(a2b_hex(options.autn))
 
-    if options.sim == True:
+    if options.sim is True:
         handle_sim(options, rand_bin)
     else:
         if not options.autn: