sysmoISIM-SJA2: Add support for programming IPv4 address for Home ePDG Identifier

This commit allows programming of IPv4 or FQDN in EF.ePDGId

Example:

./pySim-prog.py -p 0 -x 001 -y 01 -s 8988211900000000004 -i 001011234567895 -k 8baf473f2f8fd09487cccbd7097c6862 --op 11111111111111111111111111111111 -o 8E27B6AF0E692E750F32667A3B14605D -a 85524953 -n isim.test --msisdn 0598765432100 --epdgid 172.24.15.20 --pcscf pcscf.testims.org --ims-hdomain testims.org

Change-Id: I10a708d3e0c3ae398c942e3529e364dfe4bb23e7
diff --git a/pySim/cards.py b/pySim/cards.py
index d60b27a..b7be6e8 100644
--- a/pySim/cards.py
+++ b/pySim/cards.py
@@ -276,7 +276,10 @@
 	def update_epdgid(self, epdgid):
 		size = self._scc.binary_size(EF_USIM_ADF_map['ePDGId']) * 2
 		if len(epdgid) > 0:
-			epdgid_tlv = rpad(enc_addr_tlv(epdgid), size)
+			addr_type = get_addr_type(epdgid)
+			if addr_type == None:
+				raise ValueError("Unknown ePDG Id address type or invalid address provided")
+			epdgid_tlv = rpad(enc_addr_tlv(epdgid, ('%02x' % addr_type)), size)
 		else:
 			epdgid_tlv = rpad('ff', size)
 		data, sw = self._scc.update_binary(