fix comment typos concerning "challenge"

Signed-off-by: NUwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: NJiri Kosina <jkosina@suse.cz>

drivers/net/wireless/hostap/hostap_ap.c

@@ -1225,7 +1225,7 @@ static void ap_crypt_init(struct ap_data *ap)
 
 
 /* Generate challenge data for shared key authentication. IEEE 802.11 specifies
- * that WEP algorithm is used for generating challange. This should be unique,
+ * that WEP algorithm is used for generating challenge. This should be unique,
  * but otherwise there is not really need for randomness etc. Initialize WEP
  * with pseudo random key and then use increasing IV to get unique challenge
  * streams.

sound/soc/imx/imx-ssi.c

@@ -23,7 +23,7 @@
  * between pcm data and GPIO status data changes. Our FIQ handler is not
  * able to handle this, hence this driver only works with 48000Hz sampling
  * rate.
- * Reading and writing AC97 registers is another challange. The core
+ * Reading and writing AC97 registers is another challenge. The core
  * provides us status bits when the read register is updated with *another*
  * value. When we read the same register two times (and the register still
  * contains the same value) these status bits are not set. We work