[media] media: ov7670: add support for ov7675

ov7675 and ov7670 share the same registers but there is no way
to distinguish them at runtime. However, they require different
tweaks to achieve the desired resolution. For this reason this
patch adds a new ov7675 entry to the ov7670_id table.

Signed-off-by: Javier Martin <javier.martin@vista-silicon.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>