V4L/DVB (3549): Make hotplug automatically load the b2c2-flexcop-usb module

There was no MODULE_DEVICE_TABLE for the b2c2-flexcop-usb module. This makes it
impossible for hotplug to load the module automatically, when such a device is
connected.

Signed-off-by: Patrick Boettcher <pb@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>