net/ice: fix outer L4 checksum in scalar Rx

In scalar datapath, ol_flag shows RTE_MBUF_F_RX_OUTER_L4_CKSUM_UNKNOWN
which is error, therefore fixing this bug.

Fixes: 94005e4 ("net/ice: fix build with 16-byte Rx descriptor")
Cc: stable@dpdk.org

Signed-off-by: Wenjing Qiao <wenjing.qiao@intel.com>
Reported-by: Xiao Wang <xiao.w.wang@intel.com>
Acked-by: Qi Zhang <qi.z.zhang@intel.com>

drivers/net/ice/ice_rxtx.c

@@ -1497,7 +1497,9 @@ ice_rxd_error_to_pkt_flags(uint16_t stat_err0)
 		return 0;
 
 	if (likely(!(stat_err0 & ICE_RX_FLEX_ERR0_BITS))) {
-		flags |= (RTE_MBUF_F_RX_IP_CKSUM_GOOD | RTE_MBUF_F_RX_L4_CKSUM_GOOD);
+		flags |= (RTE_MBUF_F_RX_IP_CKSUM_GOOD |
+			  RTE_MBUF_F_RX_L4_CKSUM_GOOD |
+			  RTE_MBUF_F_RX_OUTER_L4_CKSUM_GOOD);
 		return flags;
 	}