brcmfmac: Avoid GFP_ATOMIC when GFP_KERNEL is enough

A workqueue is not atomic, so constraints can be relaxed here.
GFP_KERNEL can be used instead of GFP_ATOMIC.

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Acked-by: Arend van Spriel <arend.vanspriel@broadcom.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/b6e619415db4ee5de95389280d7195bb56e45f77.1618860716.git.christophe.jaillet@wanadoo.fr

drivers/net/wireless/broadcom/brcm80211/brcmfmac/core.c

@@ -151,7 +151,7 @@ static void _brcmf_set_multicast_list(struct work_struct *work)
 	/* Send down the multicast list first. */
 	cnt = netdev_mc_count(ndev);
 	buflen = sizeof(cnt) + (cnt * ETH_ALEN);
-	buf = kmalloc(buflen, GFP_ATOMIC);
+	buf = kmalloc(buflen, GFP_KERNEL);
 	if (!buf)
 		return;
 	bufp = buf;