doc: fix a few typos

Signed-off-by: Masanari Iida <standby24x7@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
diff --git a/Documentation/usb/wusb-cbaf b/Documentation/usb/wusb-cbaf
index 426ddaa..8b3d43e 100644
--- a/Documentation/usb/wusb-cbaf
+++ b/Documentation/usb/wusb-cbaf
@@ -36,7 +36,7 @@
 
  get-cdid DEVICE
 
-   Get the device ID associated to the HOST-CHDI we sent with
+   Get the device ID associated to the HOST-CHID we sent with
    'set-chid'. We might not know about it.
 
  set-cc DEVICE