HID: Microsoft Win8 Wireless Radio Controls cleanup

Use a better URL for the HUTRR40 Radio HID Usages documentation and use the
HID_GD_WIRELESS_RADIO_CTLS define rather then hardcoding a check for
0x0001000c.

Fixes: 61df56bef9 ("HID: Add mapping for Microsoft Win8 Wireless Radio Controls extensions")
Suggested-by: Benjamin Tissoires <[e-mail]>
Signed-off-by: Hans de Goede <[e-mail]>
Signed-off-by: Jiri Kosina <[e-mail]>

drivers/hid/hid-input.c

···
 
 		case HID_GD_RFKILL_BTN:
 			/* MS wireless radio ctl extension, also check CA */
-			if (field->application == 0x0001000c) {
+			if (field->application == HID_GD_WIRELESS_RADIO_CTLS) {
 				map_key_clear(KEY_RFKILL);
 				/* We need to simulate the btn release */
 				field->flags |= HID_MAIN_ITEM_RELATIVE;

include/linux/hid.h

···
 #define HID_GD_KEYPAD		0x00010007
 #define HID_GD_MULTIAXIS	0x00010008
 /*
- * Microsoft Win8 Wireless Radio Controls extensions CA, see (checked 09052017):
- * https://docs.microsoft.com/en-us/windows-hardware/drivers/hid/airplane-mode-radio-management
- * https://web.archive.org/web/20170509144631/https://docs.microsoft.com/en-us/windows-hardware/drivers/hid/airplane-mode-radio-management
+ * Microsoft Win8 Wireless Radio Controls extensions CA, see:
+ * http://www.usb.org/developers/hidpage/HUTRR40RadioHIDUsagesFinal.pdf
  */
 #define HID_GD_WIRELESS_RADIO_CTLS	0x0001000c
 #define HID_GD_X		0x00010030