net/mlx4_en: Don't use irq_affinity_notifier to track changes in IRQ affinity map

IRQ affinity notifier can only have a single notifier - cpu_rmap
notifier. Can't use it to track changes in IRQ affinity map.
Detect IRQ affinity changes by comparing CPU to current IRQ affinity map
during NAPI poll thread.

CC: Thomas Gleixner <tglx@linutronix.de>
CC: Ben Hutchings <ben@decadent.org.uk>
Fixes: 2eacc23 ("net/mlx4_core: Enforce irq affinity changes immediatly")
Signed-off-by: Amir Vadai <amirv@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --cc drivers/net/ethernet/mellanox/mlx4/cq.c
Simple merge

diff --cc drivers/net/ethernet/mellanox/mlx4/en_cq.c
Simple merge

diff --cc drivers/net/ethernet/mellanox/mlx4/en_rx.c
Simple merge

diff --cc drivers/net/ethernet/mellanox/mlx4/en_tx.c
Simple merge

diff --cc drivers/net/ethernet/mellanox/mlx4/eq.c
Simple merge

diff --cc drivers/net/ethernet/mellanox/mlx4/mlx4_en.h
Simple merge

diff --cc include/linux/mlx4/device.h
Simple merge