Use the generic method read_binary of card class to read AD

Change-Id: Ie7f62913caed95f482445962954857bb69b58078
diff --git a/pySim-read.py b/pySim-read.py
index c2e63a0..98a2e81 100755
--- a/pySim-read.py
+++ b/pySim-read.py
@@ -213,7 +213,7 @@
 		print("MSISDN: Can't read file -- " + str(e))
 
 	# EF.AD
-	(res, sw) = scc.read_binary(['3f00', '7f20', '6fad'])
+	(res, sw) = card.read_binary('AD')
 	if sw == '9000':
 		print("AD: %s" % (res,))
 	else: