V4L/DVB (14005): media/video Kconfig: Mark gspca superceeded drivers as deprecated

We have some duplicate functionality between the zc0301 and gspca-zc3xx,
the sn9c102 and gspca-sonixb + gspca-sonix, and et61x251 and gscpa-etoms
drivers.

The non gspca versions of these drivers not only show a lot of code
duplicty (amongsth each other), as they all copy the same generic usb
webcam code instead of using some sort of framework. They also have not
seen any updates for more then 2 years, where as the gspca drivers are
actively maintained.

So it is time for the non gspca versions of these drivers to go away,
marking them as deprecated is the first step in this.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>