V4L/DVB (3280): Changed description of KWorld PVR TV 2800RF

Changed description of KWorld PVR TV 2800RF

Signed-off-by: Markus Rechberger <[e-mail]>
Signed-off-by: Mauro Carvalho Chehab <[e-mail]>

Documentation/video4linux/CARDLIST.em28xx

···
   7 -> Leadtek Winfast USB II                   (em2800)
   8 -> Kworld USB2800                           (em2800)
   9 -> Pinnacle Dazzle DVC 90                   (em2820/em2840) [2304:0207]
- 12 -> Unknown EM2820/2840 video grabber        (em2820/em2840)
+ 12 -> Kworld PVR TV 2800 RF                    (em2820/em2840)

drivers/media/video/em28xx/em28xx-cards.c

···
 		}},
 	},
 	[EM2820_BOARD_KWORLD_PVRTV2800RF] = {
-		.name         = "Unknown EM2820/2840 video grabber",
+		.name         = "Kworld PVR TV 2800 RF",
 		.is_em2800    = 0,
 		.vchannels    = 2,
 		.norm         = VIDEO_MODE_PAL,