ionic: fix a sleeping in atomic bug

This code is holding spin_lock_bh(&lif->rx_filters.lock); so the
allocation needs to be atomic.

Fixes: 969f84394604 ("ionic: sync the filters in the work task")
Signed-off-by: Dan Carpenter <[e-mail]>
Signed-off-by: Shannon Nelson <[e-mail]>
Link: https://lore.kernel.org/r/20210903131856.GA25934@kili
Signed-off-by: Jakub Kicinski <[e-mail]>

drivers/net/ethernet/pensando/ionic/ionic_rx_filter.c

···
 			if (f->state == IONIC_FILTER_STATE_NEW ||
 			    f->state == IONIC_FILTER_STATE_OLD) {
 				sync_item = devm_kzalloc(dev, sizeof(*sync_item),
-							 GFP_KERNEL);
+							 GFP_ATOMIC);
 				if (!sync_item)
 					goto loop_out;