net: bgmac: Drop free_netdev() from bgmac_enet_remove()

netdev is allocated in bgmac_alloc() with devm_alloc_etherdev() and will
be auto released in ->remove and ->probe failure path. Using free_netdev()
in bgmac_enet_remove() leads to double free.

Fixes: 34a5102c ("net: bgmac: allocate struct bgmac just once & don't copy it")
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>

Link: https://lore.kernel.org/r/20221109150136.2991171-1-weiyongjun@huaweicloud.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/ethernet/broadcom/bgmac.c

@@ -1568,7 +1568,6 @@ void bgmac_enet_remove(struct bgmac *bgmac)
 	phy_disconnect(bgmac->net_dev->phydev);
 	netif_napi_del(&bgmac->napi);
 	bgmac_dma_free(bgmac);
-	free_netdev(bgmac->net_dev);
 }
 EXPORT_SYMBOL_GPL(bgmac_enet_remove);