RDMA/cma: Use existing netif_is_bond_master function

When checking whatever the current netdev is the bond master interface,
use kernel API netif_is_bond_master() instead of hardcoding the check.
No functionality is changed.

Reviewed-by: Mark Bloch <markb@mellanox.com>
Signed-off-by: Parav Pandit <parav@mellanox.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Reviewed-by: Yuval Shaia <yuval.shaia@oracle.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

drivers/infiniband/core/cma.c

@@ -4294,7 +4294,7 @@ static int cma_netdev_callback(struct notifier_block *self, unsigned long event,
 	if (event != NETDEV_BONDING_FAILOVER)
 		return NOTIFY_DONE;
 
-	if (!(ndev->flags & IFF_MASTER) || !(ndev->priv_flags & IFF_BONDING))
+	if (!netif_is_bond_master(ndev))
 		return NOTIFY_DONE;
 
 	mutex_lock(&lock);