isimodem: Fix message sending in SMS driver

The same enum name SMS_ROUTE_DEFAULT has different constants in
different modem API versions. This was causing "invalid parameter"
errors with some modems.

drivers/isimodem/sms.c

@@ -469,7 +469,7 @@ static gboolean submit_tpdu(GIsiClient *client, unsigned char *pdu, int pdu_len,
 	uint8_t hdr[] = {
 		SMS_MESSAGE_SEND_REQ,
 		mms,		/* More messages to send */
-		SMS_ROUTE_DEFAULT,
+		SMS_ROUTE_ANY,	/* Use any (default) route */
 		0,		/* Repeated message */
 		0, 0,		/* Filler */
 		2,		/* Subblock count */

drivers/isimodem/sms.h

@@ -163,6 +163,7 @@ enum sms_routing_command {
 };
 
 enum sms_route_preference {
+	SMS_ROUTE_ANY =			0x00,
 	SMS_ROUTE_GPRS_PREF =		0x00,
 	SMS_ROUTE_CS =			0x01,
 	SMS_ROUTE_GPRS =		0x02,