V4L/DVB (10299): bttv: Add support for IVCE-8784 support for V4L2 bttv driver

It's a quad Bt878 PCI-e x1 capture board that's basically the same as the
IVC-200 (quad Bt878 PCI) capture board that's currently supported in
the V4L2 bttv driver.

Manufacturer's web page for IVCE-8784 with photo and info:
  http://www.iei.com.tw/en/product_IPC.asp?model=IVCE-8784



Signed-off-by: Douglas Kosovic <douglask@itee.uq.edu.au>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>