[media] dvbsky: don't print MAC address from read_mac_address

The dvb-usb-v2 already prints out the MAC address, no need to print
it out also here.

Signed-off-by: Olli Salonen <olli.salonen@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>