nfp: standardize FW header whitespace

The nfp_net_ctrl.h file used spaces for indentation in the past but
tabs have crept in.  Host driver files use tabs for indentation by
default, so let's convert to tabs for consistency across the file
and our drivers.
Signed-off-by: Michael Rapson <michael.rapson@netronome.com>
Acked-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/netronome/nfp/nfp_net_ctrl.h

 /*
- * Copyright (C) 2015-2017 Netronome Systems, Inc.
+ * Copyright (C) 2015-2018 Netronome Systems, Inc.
  *
  * This software is dual licensed under the GNU General License Version 2,
  * June 1991 as shown in the file COPYING in the top-level directory of this