net: macb: fixup sparse warnings on __be16 ports

The port fields in the ethool flow structures are defined
to be __be16 types, so sparse is showing issues where these
are being passed to htons(). Fix these warnings by passing
them to be16_to_cpu() instead.

These are being used in netdev_dbg() so should only effect
anyone doing debug.

Fixes the following sparse warnings:

drivers/net/ethernet/cadence/macb_main.c:3366:9: warning: cast from restricted __be16
drivers/net/ethernet/cadence/macb_main.c:3366:9: warning: cast from restricted __be16
drivers/net/ethernet/cadence/macb_main.c:3366:9: warning: cast from restricted __be16
drivers/net/ethernet/cadence/macb_main.c:3419:25: warning: cast from restricted __be16
drivers/net/ethernet/cadence/macb_main.c:3419:25: warning: cast from restricted __be16
drivers/net/ethernet/cadence/macb_main.c:3419:25: warning: cast from restricted __be16
drivers/net/ethernet/cadence/macb_main.c:3419:25: warning: cast from restricted __be16

Signed-off-by: Ben Dooks <ben.dooks@sifive.com>
Link: https://lore.kernel.org/r/20220715173009.526126-1-ben.dooks@sifive.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/ethernet/cadence/macb_main.c

@@ -3482,7 +3482,8 @@ static int gem_add_flow_filter(struct net_device *netdev,
 			fs->flow_type, (int)fs->ring_cookie, fs->location,
 			htonl(fs->h_u.tcp_ip4_spec.ip4src),
 			htonl(fs->h_u.tcp_ip4_spec.ip4dst),
-			htons(fs->h_u.tcp_ip4_spec.psrc), htons(fs->h_u.tcp_ip4_spec.pdst));
+			be16_to_cpu(fs->h_u.tcp_ip4_spec.psrc),
+			be16_to_cpu(fs->h_u.tcp_ip4_spec.pdst));
 
 	spin_lock_irqsave(&bp->rx_fs_lock, flags);
 
@@ -3535,8 +3536,8 @@ static int gem_del_flow_filter(struct net_device *netdev,
 					fs->flow_type, (int)fs->ring_cookie, fs->location,
 					htonl(fs->h_u.tcp_ip4_spec.ip4src),
 					htonl(fs->h_u.tcp_ip4_spec.ip4dst),
-					htons(fs->h_u.tcp_ip4_spec.psrc),
-					htons(fs->h_u.tcp_ip4_spec.pdst));
+					be16_to_cpu(fs->h_u.tcp_ip4_spec.psrc),
+					be16_to_cpu(fs->h_u.tcp_ip4_spec.pdst));
 
 			gem_writel_n(bp, SCRT2, fs->location, 0);