The EMAC driver had a custom IBM_EMAC_RX_SKB_HEADROOM
Kconfig option that reserved additional skb headroom for RX.
This patch removes the option and migrates the code
to use napi_alloc_skb() and netdev_alloc_skb_ip_align()
in its place.
Signed-off-by: NChristian Lamparter <chunkeey@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>