[media] ngene: fix commit 6819176fb9ea6761f0a13be9bdf6204119dab7e1

[media] ngene: fix commit 6819176fb9ea6761f0a13be9bdf6204119dab7e1

The above commit were applied only partially; it broke tuner and
demod attach, but the part that added it to ngene_info was missing.

Not sure what happened there, but, without this patch, a regression
would be happening.

Also, gcc complains about a defined but not used symbol.

So, apply manually the missing part.

Cc: Patrice Chotard <patricechotard@free.fr>
Cc: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>