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/ioctl.h b/drivers/net/wireless/mwifiex/ioctl.h
index 703a6d1..5488e11 100644
--- a/drivers/net/wireless/mwifiex/ioctl.h
+++ b/drivers/net/wireless/mwifiex/ioctl.h
@@ -268,14 +268,13 @@
 };
 
 #define MWIFIEX_KEY_INDEX_UNICAST	0x40000000
-#define MWIFIEX_MAX_KEY_LENGTH		32
 #define WAPI_RXPN_LEN			16
 
 struct mwifiex_ds_encrypt_key {
 	u32 key_disable;
 	u32 key_index;
 	u32 key_len;
-	u8 key_material[MWIFIEX_MAX_KEY_LENGTH];
+	u8 key_material[WLAN_MAX_KEY_LEN];
 	u8 mac_addr[ETH_ALEN];
 	u32 is_wapi_key;
 	u8 wapi_rxpn[WAPI_RXPN_LEN];