V4L/DVB (4641): Trivial: use lowercase letters in hex subsystem ids

Signed-off-by: NMichael Krufky <mkrufky@linuxtv.org>
Signed-off-by: NMauro Carvalho Chehab <mchehab@infradead.org>

Documentation/video4linux/CARDLIST.cx88

@@ -7,7 +7,7 @@
   6 -> AverTV Studio 303 (M126)                            [1461:000b]
   7 -> MSI TV-@nywhere Master                              [1462:8606]
   8 -> Leadtek Winfast DV2000                              [107d:6620]
-  9 -> Leadtek PVR 2000                                    [107d:663b,107d:663C,107d:6632]
+  9 -> Leadtek PVR 2000                                    [107d:663b,107d:663c,107d:6632]
  10 -> IODATA GV-VCP3/PCI                                  [10fc:d003]
  11 -> Prolink PlayTV PVR
  12 -> ASUS PVR-416                                        [1043:4823,1461:c111]

drivers/media/video/cx88/cx88-cards.c

@@ -1348,7 +1348,7 @@ struct cx88_subid cx88_subids[] = {
 		.card      = CX88_BOARD_LEADTEK_PVR2000,
 	},{
 		.subvendor = 0x107d,
-		.subdevice = 0x663C,
+		.subdevice = 0x663c,
 		.card      = CX88_BOARD_LEADTEK_PVR2000,
 	},{
 		.subvendor = 0x1461,