net: bcmgenet: remove unused spinlock member

The spinlock cookie in bcmgenet_priv is never used, get rid of it.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --cc drivers/net/ethernet/broadcom/genet/bcmgenet.c
Simple merge

diff --cc drivers/net/ethernet/broadcom/genet/bcmgenet.h
Simple merge