wlan: Fix issues reported by code inspection tool

Address issues found by third party code inspection tool

Change-Id: I873bc845487a72338ef5aaf705c54d005284b45d
CRs-fixed: 555246
diff --git a/CORE/HDD/src/wlan_hdd_debugfs.c b/CORE/HDD/src/wlan_hdd_debugfs.c
index 26ebde0..9d36ff4 100644
--- a/CORE/HDD/src/wlan_hdd_debugfs.c
+++ b/CORE/HDD/src/wlan_hdd_debugfs.c
@@ -117,7 +117,7 @@
                const char __user *buf, size_t count, loff_t *ppos)
 {
     hdd_adapter_t *pAdapter = (hdd_adapter_t *)file->private_data;
-    hdd_context_t *pHddCtx = WLAN_HDD_GET_CTX(pAdapter);
+    hdd_context_t *pHddCtx;
     tSirAddPeriodicTxPtrn *addPeriodicTxPtrnParams;
     tSirDelPeriodicTxPtrn *delPeriodicTxPtrnParams;
 
@@ -137,6 +137,8 @@
         return -EINVAL;
     }
 
+    pHddCtx = WLAN_HDD_GET_CTX(pAdapter);
+
     if (!sme_IsFeatureSupportedByFW(WLAN_PERIODIC_TX_PTRN))
     {
         VOS_TRACE( VOS_MODULE_ID_HDD, VOS_TRACE_LEVEL_ERROR,