igb: Cleanups to change comment style on license headers

This patch fixes WARNING:NETWORKING_BLOCK_COMMENT_STYLE from checkpatch file check.

Signed-off-by: Carolyn Wyborny <carolyn.wyborny@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

diff --cc drivers/net/ethernet/intel/igb/e1000_82575.c
Simple merge

diff --cc drivers/net/ethernet/intel/igb/e1000_82575.h
Simple merge

diff --cc drivers/net/ethernet/intel/igb/e1000_defines.h
Simple merge

diff --cc drivers/net/ethernet/intel/igb/e1000_hw.h
Simple merge

diff --cc drivers/net/ethernet/intel/igb/e1000_i210.c
Simple merge

diff --cc drivers/net/ethernet/intel/igb/e1000_i210.h
Simple merge

diff --cc drivers/net/ethernet/intel/igb/e1000_mac.c
Simple merge

diff --cc drivers/net/ethernet/intel/igb/e1000_mac.h
Simple merge

diff --cc drivers/net/ethernet/intel/igb/e1000_mbx.c
Simple merge

diff --cc drivers/net/ethernet/intel/igb/e1000_mbx.h
Simple merge

diff --cc drivers/net/ethernet/intel/igb/e1000_nvm.c
Simple merge

diff --cc drivers/net/ethernet/intel/igb/e1000_nvm.h
Simple merge

diff --cc drivers/net/ethernet/intel/igb/e1000_phy.c
Simple merge

diff --cc drivers/net/ethernet/intel/igb/e1000_phy.h
Simple merge

diff --cc drivers/net/ethernet/intel/igb/e1000_regs.h
Simple merge

diff --cc drivers/net/ethernet/intel/igb/igb.h
Simple merge

diff --cc drivers/net/ethernet/intel/igb/igb_ethtool.c
Simple merge

diff --cc drivers/net/ethernet/intel/igb/igb_hwmon.c
Simple merge

diff --cc drivers/net/ethernet/intel/igb/igb_main.c
Simple merge