PCH_GbE : Fixed the issue of checksum judgment

The checksum judgment was mistaken.
  Judgment result
     0:Correct 1:Wrong

This patch fixes the issue.

Signed-off-by: Toshiharu Okada <toshiharu-linux@dsn.okisemi.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/pch_gbe/pch_gbe_main.c b/drivers/net/pch_gbe/pch_gbe_main.c
index 4ebd1d4..9f6c402 100644
--- a/drivers/net/pch_gbe/pch_gbe_main.c
+++ b/drivers/net/pch_gbe/pch_gbe_main.c
@@ -1493,12 +1493,11 @@
 			/* Write meta date of skb */
 			skb_put(skb, length);
 			skb->protocol = eth_type_trans(skb, netdev);
-			if ((tcp_ip_status & PCH_GBE_RXD_ACC_STAT_TCPIPOK) ==
-			    PCH_GBE_RXD_ACC_STAT_TCPIPOK) {
-				skb->ip_summed = CHECKSUM_UNNECESSARY;
-			} else {
+			if (tcp_ip_status & PCH_GBE_RXD_ACC_STAT_TCPIPOK)
 				skb->ip_summed = CHECKSUM_NONE;
-			}
+			else
+				skb->ip_summed = CHECKSUM_UNNECESSARY;
+
 			napi_gro_receive(&adapter->napi, skb);
 			(*work_done)++;
 			pr_debug("Receive skb->ip_summed: %d length: %d\n",