qcacld-3.0: Fix data hiding violation in __iw_get_char_setnone()

Currently in __iw_get_char_setnone() while processing the
WE_GET_STATES ioctl a call is made to PMAC_STRUCT() to convert a HAL
handle into a tpAniSirGlobal (aka pMac). This is a data hiding
violation since use of pMac should be constrained to the UMAC -- HDD
should not be utilizing this data structure. And it turns out that
after PMAC_STRUCT() is called the resulting pMac actually isn't used
other than testing for NULL. Furthermore this is dead code since the
HAL handle was already tested for NULL and hence the pMac could never
be NULL at the point it is tested. So fix this data hiding violation
by completely removing the code that populates and tests pMac.

Change-Id: I73fc7c388f4482e5c483a4982231f934cc80ef6c
CRs-Fixed: 2232897

core/hdd/src/wlan_hdd_wext.c

@@ -6441,7 +6441,6 @@ static int __iw_get_char_setnone(struct net_device *dev,
 		int count = 0, check = 1;
 
 		tHalHandle hHal = NULL;
-		tpAniSirGlobal pMac = NULL;
 		struct hdd_station_ctx *sta_ctx = NULL;
 
 		struct hdd_context *hdd_ctx = WLAN_HDD_GET_CTX(adapter);
@@ -6495,19 +6494,9 @@ static int __iw_get_char_setnone(struct net_device *dev,
 
 			hHal = WLAN_HDD_GET_HAL_CTX(useAdapter);
 			if (!hHal) {
-				buf =
-					scnprintf(extra + len,
-						  WE_MAX_STR_LEN - len,
-						  "\n pMac is NULL");
-				len += buf;
-				break;
-			}
-			pMac = PMAC_STRUCT(hHal);
-			if (!pMac) {
-				buf =
-					scnprintf(extra + len,
-						  WE_MAX_STR_LEN - len,
-						  "\n pMac is NULL");
+				buf = scnprintf(extra + len,
+						WE_MAX_STR_LEN - len,
+						"\n hHal is NULL");
 				len += buf;
 				break;
 			}