mwifiex: use IEEE80211_HT_PARAM_CHA_SEC_* macros

Replace driver specific macros with the corresponding
IEEE80211_HT_PARAM_CHA_SEC_* macros defined in ieee80211.h.
Also, rename 'adapter->chan_offset' to 'adapter->sec_chan_offset'
for consistency.

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/init.c b/drivers/net/wireless/mwifiex/init.c
index 244c728..e05b417 100644
--- a/drivers/net/wireless/mwifiex/init.c
+++ b/drivers/net/wireless/mwifiex/init.c
@@ -246,7 +246,7 @@
 	memset(adapter->event_body, 0, sizeof(adapter->event_body));
 	adapter->hw_dot_11n_dev_cap = 0;
 	adapter->hw_dev_mcs_support = 0;
-	adapter->chan_offset = 0;
+	adapter->sec_chan_offset = 0;
 	adapter->adhoc_11n_enabled = false;
 
 	mwifiex_wmm_init(adapter);