net: macb: change GFP_ATOMIC to GFP_KERNEL

Now that the rx_fs_lock is no longer held across allocation, it's safe
to use GFP_KERNEL for allocating new entries.

This reverts commit 81da3bf ("net: macb: change GFP_KERNEL to
GFP_ATOMIC").

Cc: Julia Lawall <julia.lawall@lip6.fr>
Signed-off-by: Julia Cartwright <julia@ni.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Author: Julia Cartwright

drivers/net/ethernet/cadence/macb_main.c

@@ -2800,7 +2800,7 @@ static int gem_add_flow_filter(struct net_device *netdev,
 	int ret = -EINVAL;
 	bool added = false;
 
-	newfs = kmalloc(sizeof(*newfs), GFP_ATOMIC);
+	newfs = kmalloc(sizeof(*newfs), GFP_KERNEL);
 	if (newfs == NULL)
 		return -ENOMEM;
 	memcpy(&newfs->fs, fs, sizeof(newfs->fs));