SysmoISIM-SJA2: Add option to set Service Provider Name (SPN)

Same implementation as for sysmoUSIM-SJS1

Change-Id: I3a9dd2fe85126584758ea4cfa127f9cd14ab0c7d
diff --git a/pySim/cards.py b/pySim/cards.py
index 5eb2884..ad6ddbc 100644
--- a/pySim/cards.py
+++ b/pySim/cards.py
@@ -1266,6 +1266,11 @@
 		# select DF_GSM
 		self._scc.select_path(['7f20'])
 
+		# set Service Provider Name
+		if p.get('name') is not None:
+			content = enc_spn(p['name'], True, True)
+			data, sw = self._scc.update_binary('6F46', rpad(content, 32))
+
 		# write EF.IMSI
 		if p.get('imsi'):
 			self._scc.update_binary('6f07', enc_imsi(p['imsi']))