add missing USBIP_CORE item in config-3.0

SVN-Revision: 27195

target/linux/generic/config-3.0

@@ -2698,6 +2698,7 @@ CONFIG_UNIX98_PTYS=y
 # CONFIG_UNIXWARE_DISKLABEL is not set
 # CONFIG_UNUSED_SYMBOLS is not set
 # CONFIG_USB is not set
+# CONFIG_USBIP_CORE is not set
 # CONFIG_USBPCWATCHDOG is not set
 # CONFIG_USB_ACM is not set
 # CONFIG_USB_ADUTUX is not set