ixgbe: fix broken ipsec Rx with proper cast on spi

Fix up a cast problem introduced by a sparse cleanup patch.  This fixes
a problem where the encrypted packets were not recognized on Rx and
subsequently dropped.

Fixes: 9cfbfa70 ("ixgbe: cleanup sparse warnings")
Signed-off-by: Shannon Nelson <shannon.nelson@oracle.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

drivers/net/ethernet/intel/ixgbe/ixgbe_ipsec.c

@@ -663,7 +663,7 @@ static int ixgbe_ipsec_add_sa(struct xfrm_state *xs)
 
 		/* hash the new entry for faster search in Rx path */
 		hash_add_rcu(ipsec->rx_sa_list, &ipsec->rx_tbl[sa_idx].hlist,
-			     (__force u64)rsa.xs->id.spi);
+			     (__force u32)rsa.xs->id.spi);
 	} else {
 		struct tx_sa tsa;