V4L/DVB (11339): af9015: remove wrong definitions

Remove wrong GPIO definitions. GPIOs used by AF9015 are	property of the
AF9013 demodulator and are coming from there.

Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>