ethernet: Use bool function returns of true/false instead of 1/0

Use bool constants as the return values instead of 1 and 0.

Signed-off-by: Joe Perches <joe@perches.com>
Acked-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --cc drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c
Simple merge

diff --cc drivers/net/ethernet/intel/ixgbe/ixgbe_ethtool.c
Simple merge

diff --cc drivers/net/ethernet/xilinx/xilinx_emaclite.c
Simple merge