staging: vt6655: wcmd.c: fix print priority warning

This patch fixes the following warning generated by checkpatch.pl
for the file wcmd.c

WARNING: printk() should include KERN_ facility level

printk was replaced by netdev_err since providing printk with the
facility level KERN_ERR generated the printing priority warning.
Signed-off-by: Aya Mahfouz <mahfouz.saif.elyazal@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/vt6655/wcmd.c

@@ -665,7 +665,8 @@ vCommandTimer(
 			add_timer(&pDevice->sTimerTxData);
 
 		} else if (pMgmt->eCurrState < WMAC_STATE_ASSOCPENDING) {
-			printk("WLAN_ASSOCIATE_WAIT:Association Fail???\n");
+			netdev_err(pDevice->dev,
+				   "WLAN_ASSOCIATE_WAIT:Association Fail???\n");
 		} else if (pDevice->byLinkWaitCount <= 4) {    //mike add:wait another 2 sec if associated_frame delay!
 			pDevice->byLinkWaitCount++;
 			pr_debug("WLAN_ASSOCIATE_WAIT:wait %d times!!\n", pDevice->byLinkWaitCount);