staging: wlan-ng: Correct typo in comment message

Add space between two words for better readability in the
comments.

Signed-off-by: Branden Bonaby <brandonbonaby94@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/wlan-ng/hfa384x_usb.c

@@ -1,7 +1,7 @@
 /* SPDX-License-Identifier: (GPL-2.0 OR MPL-1.1) */
 /* src/prism2/driver/hfa384x_usb.c
  *
- * Functions that talk to the USB variantof the Intersil hfa384x MAC
+ * Functions that talk to the USB variant of the Intersil hfa384x MAC
  *
  * Copyright (C) 1999 AbsoluteValue Systems, Inc.  All Rights Reserved.
  * --------------------------------------------------------------------