If USB_NET_CDC_NCM is y and USB_NET_CDCETHER is m, build fails:
drivers/net/usb/cdc_ncm.o:(.rodata+0x1d8): undefined reference to `usbnet_cdc_update_filter'
Select USB_NET_CDCETHER for USB_NET_CDC_NCM to fix this.
Reported-by: Hulk Robot <hulkci@huawei.com> Fixes: e10dcb1b6ba7 ("net: cdc_ncm: hook into set_rx_mode to admit multicast traffic") Signed-off-by: YueHaibing <yuehaibing@huawei.com> Signed-off-by: David S. Miller <davem@davemloft.net>