staging: ks7010: don't print skb->dev->name if skb is null

A null pointer dereference will occur when skb is null and
skb->dev->name is printed.  Replace the skb->dev->name with
plain text "ks_wlan" to fix this.
Signed-off-by: NColin Ian King <colin.king@canonical.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/ks7010/ks_hostif.c

@@ -485,8 +485,7 @@ void hostif_data_indication(struct ks_wlan_private *priv)
 			netif_rx(skb);
 		} else {
 			printk(KERN_WARNING
-			       "%s: Memory squeeze, dropping packet.\n",
-			       skb->dev->name);
+			       "ks_wlan: Memory squeeze, dropping packet.\n");
 			priv->nstats.rx_dropped++;
 		}
 		break;
@@ -521,8 +520,7 @@ void hostif_data_indication(struct ks_wlan_private *priv)
 			netif_rx(skb);
 		} else {
 			printk(KERN_WARNING
-			       "%s: Memory squeeze, dropping packet.\n",
-			       skb->dev->name);
+			       "ks_wlan: Memory squeeze, dropping packet.\n");
 			priv->nstats.rx_dropped++;
 		}
 		break;