This patch adds the controlling interfaces for the Huawei E398.

Thanks to Bjørn Mork <bjorn@mork.no> for extracting the interface
numbers from the windows driver.
Signed-off-by: NAlex Hermann <alex@wenlex.nl>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>