net: bcmgenet: use __be16 for htons(ETH_P_IP)

The 16-bit value that holds a short in network byte order should
be declared as a restricted big endian type to allow type checks
to succeed during assignment.

Fixes: 3e370952 ("net: bcmgenet: add support for ethtool rxnfc flows")
Reported-by: kbuild test robot <lkp@intel.com>
Signed-off-by: Doug Berger <opendmb@gmail.com>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/broadcom/genet/bcmgenet.c

@@ -610,8 +610,9 @@ static int bcmgenet_hfb_create_rxnfc_filter(struct bcmgenet_priv *priv,
 {
 	struct ethtool_rx_flow_spec *fs = &rule->fs;
 	int err = 0, offset = 0, f_length = 0;
-	u16 val_16, mask_16;
 	u8 val_8, mask_8;
+	__be16 val_16;
+	u16 mask_16;
 	size_t size;
 	u32 *f_data;