-ubsa needs to be attached as whole device on USB, because it sets

the configuration. The match/attach code was assuming whole-device
 attach args all the time.
-Use the first (ie index 0) configuration for ubsa -- it makes the
 code work in at least one case (PR kern/39211 by Frank Wille), and
 there is no indication that an alternative configuration would
 be needed. (I've admittedly never seen a usb device with more than
 one configuration.)
This fixes mistakes when uhmodem support was added, and the changes were
not tested with a Huawei device yet. So please test if you can.

sys/dev/usb/files.usb

@@ -1,4 +1,4 @@
-#	$NetBSD: files.usb,v 1.84 2008/05/26 00:23:05 christos Exp $
+#	$NetBSD: files.usb,v 1.85 2008/07/31 22:01:15 drochner Exp $
 #
 # Config file and device description for machine-independent USB code.
 # Included by ports that need it.  Ports that use it must provide
@@ -237,8 +237,7 @@ file	dev/usb/uvscom.c		uvscom
 define	ubsa_common
 file	dev/usb/ubsa_common.c		ubsa_common
 device	ubsa: ucombus, ubsa_common
-#attach	ubsa at usbdevif
-attach	ubsa at usbifif
+attach	ubsa at usbdevif
 file	dev/usb/ubsa.c			ubsa
 
 # Huawei E220 3G/HSDPA modem (ubsa)

sys/dev/usb/ubsavar.h

@@ -1,4 +1,4 @@
-/*	$NetBSD: ubsavar.h,v 1.5 2008/05/24 16:40:58 cube Exp $	*/
+/*	$NetBSD: ubsavar.h,v 1.6 2008/07/31 22:01:15 drochner Exp $	*/
 /*-
  * Copyright (c) 2002, Alexander Kabaev <kan.FreeBSD.org>.
  * All rights reserved.
@@ -55,7 +55,7 @@
 
 #define	UBSA_MODVER		1	/* module version */
 
-#define	UBSA_DEFAULT_CONFIG_INDEX	1
+#define	UBSA_DEFAULT_CONFIG_INDEX	0
 #define	UBSA_IFACE_INDEX_OFFSET	0
 
 #define	UBSA_INTR_INTERVAL	100	/* ms */