Rfkill is using	minor 242, document that.

Signed-off-by: Pavel Machek <pavel@denx.de>
Fixes: 8670b2b8b029a6650d133486be9d2ace146fd29a

diff --git a/Documentation/admin-guide/devices.txt b/Documentation/admin-guide/devices.txt
index 2a97aaec8b12..763fedd94d7d 100644
--- a/Documentation/admin-guide/devices.txt
+++ b/Documentation/admin-guide/devices.txt
@@ -375,8 +375,9 @@
 		239 = /dev/uhid		User-space I/O driver support for HID subsystem
 		240 = /dev/userio	Serio driver testing device
 		241 = /dev/vhost-vsock	Host kernel driver for virtio vsock
+		242 = /dev/rfkill	Turning off radio transmissions (rfkill)
 
-		242-254			Reserved for local use
+		243-254			Reserved for local use
 		255			Reserved for MISC_DYNAMIC_MINOR
 
   11 char	Raw keyboard device	(Linux/SPARC only)

-- 
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