media: dvb-usb: a800: use an enum for the device number

The device number is currently a value that needs to be the same
on two separate tables, but the code doesn't actually enforce it,
leading to errors as boards get added or removed.

Fix it by using an enum.

Link: https://lore.kernel.org/linux-media/dc8f9ec6cc8f2e16967a61752a292c46622c01dc.1648499509.git.mchehab@kernel.orgSigned-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

drivers/media/usb/dvb-usb/a800.c

@@ -72,11 +72,17 @@ static int a800_probe(struct usb_interface *intf,
 }
 
 /* do not change the order of the ID table */
-static struct usb_device_id a800_table [] = {
-/* 00 */	{ USB_DEVICE(USB_VID_AVERMEDIA,     USB_PID_AVERMEDIA_DVBT_USB2_COLD) },
-/* 01 */	{ USB_DEVICE(USB_VID_AVERMEDIA,     USB_PID_AVERMEDIA_DVBT_USB2_WARM) },
-			{ }		/* Terminating entry */
+enum {
+	AVERMEDIA_DVBT_USB2_COLD,
+	AVERMEDIA_DVBT_USB2_WARM,
 };
+
+static struct usb_device_id a800_table[] = {
+	DVB_USB_DEV(AVERMEDIA, AVERMEDIA_DVBT_USB2_COLD),
+	DVB_USB_DEV(AVERMEDIA, AVERMEDIA_DVBT_USB2_WARM),
+	{ }
+};
+
 MODULE_DEVICE_TABLE (usb, a800_table);
 
 static struct dvb_usb_device_properties a800_properties = {
@@ -132,8 +138,8 @@ static struct dvb_usb_device_properties a800_properties = {
 	.num_device_descs = 1,
 	.devices = {
 		{   "AVerMedia AverTV DVB-T USB 2.0 (A800)",
-			{ &a800_table[0], NULL },
-			{ &a800_table[1], NULL },
+			{ &a800_table[AVERMEDIA_DVBT_USB2_COLD], NULL },
+			{ &a800_table[AVERMEDIA_DVBT_USB2_WARM], NULL },
 		},
 	}
 };