mwifiex: remove some macro definitions

use corresponding macros defined in include/linux/ieee80211.h

Signed-off-by: Amitkumar Karwar <akarwar@marvell.com>
Signed-off-by: Bing Zhao <bzhao@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/mwifiex/sta_ioctl.c b/drivers/net/wireless/mwifiex/sta_ioctl.c
index 03085a3..e7adaab 100644
--- a/drivers/net/wireless/mwifiex/sta_ioctl.c
+++ b/drivers/net/wireless/mwifiex/sta_ioctl.c
@@ -1147,7 +1147,7 @@
 	struct host_cmd_ds_802_11_key_material *ibss_key;
 
 	/* Current driver only supports key length of up to 32 bytes */
-	if (encrypt_key->key_len > MWIFIEX_MAX_KEY_LENGTH) {
+	if (encrypt_key->key_len > WLAN_MAX_KEY_LEN) {
 		dev_err(priv->adapter->dev, "key length too long\n");
 		return -1;
 	}