wlan:Check priviledge permission before processing SET_OEM_DATA_REQ IOCTL

Kernel assumes all SET IOCTL commands are assigned with even
numbers. But in our WLAN driver, some SET IOCTLS are assigned with
odd numbers. This leads kernel fail to check, for some SET IOCTLs,
whether user has the right permission to do SET operation.
Hence, in driver, before processing SET_OEM_DATA_REQ IOCTLs, making
sure user task has right permission to process the command.

CRs-Fixed: 930549
Git-commit: 6feb2faf80a05940618aa2eef2b62e4e2e54f148
Bug: 25344453
Signed-off-by: Amarnath Hullur Subramanyam <amarnath@codeaurora.org>

drivers/staging/qcacld-2.0/CORE/HDD/src/wlan_hdd_oemdata.c

@@ -189,6 +189,12 @@ int iw_set_oem_data_req(
     hdd_adapter_t *pAdapter = (netdev_priv(dev));
     hdd_wext_state_t *pwextBuf = WLAN_HDD_GET_WEXT_STATE_PTR(pAdapter);
 
+    if (!capable(CAP_NET_ADMIN)) {
+        VOS_TRACE(VOS_MODULE_ID_HDD, VOS_TRACE_LEVEL_ERROR,
+                  FL("permission check failed"));
+        return -EPERM;
+    }
+
     if ((WLAN_HDD_GET_CTX(pAdapter))->isLogpInProgress)
     {
        VOS_TRACE(VOS_MODULE_ID_HDD, VOS_TRACE_LEVEL_FATAL,