cdc_ether: no need to blacklist any r8152 devices

The r8152 driver does not need this anymore.

Dropping blacklist entries adds optional support for these
devices in ECM mode.

The 8153 devices are handled by the r8153_ecm driver when
in ECM mode, and must still be blacklisted here.

Signed-off-by: Bjørn Mork <bjorn@mork.no>
Signed-off-by: David S. Miller <davem@davemloft.net>