Spelling fixes: lenght->length

Signed-off-by: Paulius Zaleckas <pauliusz@yahoo.com>
Signed-off-by: Adrian Bunk <bunk@kernel.org>
diff --git a/drivers/net/wireless/libertas/scan.c b/drivers/net/wireless/libertas/scan.c
index 9a61188..69f94c9 100644
--- a/drivers/net/wireless/libertas/scan.c
+++ b/drivers/net/wireless/libertas/scan.c
@@ -1473,7 +1473,7 @@
  *  Called via lbs_prepare_and_send_command(priv, CMD_802_11_SCAN, ...)
  *  from cmd.c
  *
- *  Sends a fixed lenght data part (specifying the BSS type and BSSID filters)
+ *  Sends a fixed length data part (specifying the BSS type and BSSID filters)
  *  as well as a variable number/length of TLVs to the firmware.
  *
  *  @param priv       A pointer to struct lbs_private structure