Change the default USB template from the current 0 to -1. The reason

is that current one (mass storage device) doesn't work as it is - it
needs to be set to 0 after the LUN is configured, which is what the
cfumass rc script does.  In other words: the current default does not
work, and to actually make it work it had to be set to -1 in
/boot/loader.conf.

Reviewed by:	hselasky@
MFC after:	2 weeks
Sponsored by:	The FreeBSD Foundation

sys/dev/usb/usb_device.c

@@ -118,7 +118,7 @@ static void	usb_cdev_free(struct usb_device *);
 #ifdef	USB_TEMPLATE
 int	usb_template = USB_TEMPLATE;
 #else
-int	usb_template;
+int	usb_template = -1;
 #endif
 
 SYSCTL_PROC(_hw_usb, OID_AUTO, template,