usbnet: add missing Kconfig for KC2190 cables

Hmm, I noticed that support for one of the USB host-to-host cables
never got fully merged ... Kconfig wouldn't show it!  Fixed.

Also, changed the CDC Subset default to 'y' so that more of these
cables will work out-of-the-box.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/usb/net/cdc_subset.c b/drivers/usb/net/cdc_subset.c
index 6e3fead..bc62b01 100644
--- a/drivers/usb/net/cdc_subset.c
+++ b/drivers/usb/net/cdc_subset.c
@@ -165,6 +165,11 @@
 #endif	/* CONFIG_USB_EPSON2888 */
 
 
+/*-------------------------------------------------------------------------
+ *
+ * info from Jonathan McDowell <noodles@earth.li>
+ *
+ *-------------------------------------------------------------------------*/
 #ifdef CONFIG_USB_KC2190
 #define HAVE_HARDWARE
 static const struct driver_info kc2190_info = {