V4L/DVB: tm6000: fix i2c addr test

The i2c addr on I2C core is specified on 7-bit format, but tm6000
expects it on 8-bit format.

Signed-off-by: Stefan Ringel <stefan.ringel@arcor.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>