utils.py: de-couple sanitize_pin_adm from argparse 'opts'

This allows the function to be re-used in other contexts

Change-Id: I116e85acca3aeb0a0c24f74653c500ac2dc1d844
diff --git a/pySim-prog.py b/pySim-prog.py
index fbf2b73..4f54963 100755
--- a/pySim-prog.py
+++ b/pySim-prog.py
@@ -446,7 +446,7 @@
 	else:
 		opc = ''.join(['%02x' % random.randrange(0,256) for i in range(16)])
 
-	pin_adm = sanitize_pin_adm(opts)
+	pin_adm = sanitize_pin_adm(opts.pin_adm, opts.pin_adm_hex)
 
 	# ePDG Selection Information
 	if opts.epdgSelection: