wlan: Use HDD indexes to access wiphy band info

To make pronto driver to work with msm-4.9 kernel,
use: HDD_NL80211_BAND_2GHZ, HDD_NL80211_BAND_5GHZ and HDD_NUM_NL80211_BANDS,
instead of IEEE80211_BAND_2GHZ, IEEE80211_BAND_5GHZ and IEEE80211_NUM_BANDS
respectively.

Change-Id: I19f7e55e86eb6e0a551de3879ff842569caf2aa4
CRs-Fixed: 2208312
diff --git a/CORE/HDD/src/wlan_hdd_cfg80211.c b/CORE/HDD/src/wlan_hdd_cfg80211.c
index ea39239..40a6177 100644
--- a/CORE/HDD/src/wlan_hdd_cfg80211.c
+++ b/CORE/HDD/src/wlan_hdd_cfg80211.c
@@ -10663,7 +10663,8 @@
 				cache_chann->channel_info[i].channel_num,
 				&freq);
 
-		for (band_num = 0; band_num < IEEE80211_NUM_BANDS; band_num++) {
+		for (band_num = 0; band_num < HDD_NUM_NL80211_BANDS;
+		     band_num++) {
 			for (channel_num = 0; channel_num <
 				wiphy->bands[band_num]->n_channels;
 				channel_num++) {
@@ -10741,7 +10742,7 @@
 				cache_chann->channel_info[i].channel_num,
 				&freq);
 
-		for (band_num = 0; band_num < IEEE80211_NUM_BANDS;
+		for (band_num = 0; band_num < HDD_NUM_NL80211_BANDS;
 							band_num++) {
 			for (band_ch_num = 0; band_ch_num <
 					wiphy->bands[band_num]->n_channels;