V4L/DVB (6535): Fix: Adds the generic PCI IDs for em28xx

Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

Documentation/video4linux/CARDLIST.em28xx

@@ -1,9 +1,9 @@
   0 -> Unknown EM2800 video grabber             (em2800)        [eb1a:2800]
-  1 -> Unknown EM2820/2840 video grabber        (em2820/em2840)
+  1 -> Unknown EM2750/28xx video grabber        (em2820/em2840) [eb1a:2750,eb1a:2820,eb1a:2821,eb1a:2860,eb1a:2861,eb1a:2870,eb1a:2881,eb1a:2883]
   2 -> Terratec Cinergy 250 USB                 (em2820/em2840) [0ccd:0036]
   3 -> Pinnacle PCTV USB 2                      (em2820/em2840) [2304:0208]
   4 -> Hauppauge WinTV USB 2                    (em2820/em2840) [2040:4200]
-  5 -> MSI VOX USB 2.0                          (em2820/em2840) [eb1a:2820]
+  5 -> MSI VOX USB 2.0                          (em2820/em2840)
   6 -> Terratec Cinergy 200 USB                 (em2800)
   7 -> Leadtek Winfast USB II                   (em2800)
   8 -> Kworld USB2800                           (em2800)