net: ethernet: i825xx: Replace unversioned GPL (GPL 1.0) notice with SPDX identifier

Replace unversioned GPL boilerplate notice with corresponding SPDX
license identifier, which is GPL 1.0+.

Cc: Donald Becker <becker@scyld.com>
Cc: Richard Hirst <richard@sleepie.demon.co.uk>
Cc: Sam Creasey <sammy@sammy.net>
Signed-off-by: Bagas Sanjaya <bagasdotme@gmail.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

drivers/net/ethernet/i825xx/82596.c

+// SPDX-License-Identifier: GPL-1.0+
 /* 82596.c: A generic 82596 ethernet driver for linux. */
 /*
    Based on Apricot.c
@@ -31,9 +32,7 @@
    Driver skeleton
    Written 1993 by Donald Becker.
    Copyright 1993 United States Government as represented by the Director,
-   National Security Agency. This software may only be used and distributed
-   according to the terms of the GNU General Public License as modified by SRC,
-   incorporated herein by reference.
+   National Security Agency.
 
    The author may be reached as becker@scyld.com, or C/O
    Scyld Computing Corporation, 410 Severn Ave., Suite 210, Annapolis MD 21403

drivers/net/ethernet/i825xx/lasi_82596.c

+// SPDX-License-Identifier: GPL-1.0+
 /* lasi_82596.c -- driver for the intel 82596 ethernet controller, as
    munged into HPPA boxen .
 
@@ -59,9 +60,7 @@
    Driver skeleton
    Written 1993 by Donald Becker.
    Copyright 1993 United States Government as represented by the Director,
-   National Security Agency. This software may only be used and distributed
-   according to the terms of the GNU General Public License as modified by SRC,
-   incorporated herein by reference.
+   National Security Agency.
 
    The author may be reached as becker@scyld.com, or C/O
    Scyld Computing Corporation, 410 Severn Ave., Suite 210, Annapolis MD 21403

drivers/net/ethernet/i825xx/lib82596.c

+// SPDX-License-Identifier: GPL-1.0+
 /* lasi_82596.c -- driver for the intel 82596 ethernet controller, as
    munged into HPPA boxen .
 
@@ -59,9 +60,7 @@
    Driver skeleton
    Written 1993 by Donald Becker.
    Copyright 1993 United States Government as represented by the Director,
-   National Security Agency. This software may only be used and distributed
-   according to the terms of the GNU General Public License as modified by SRC,
-   incorporated herein by reference.
+   National Security Agency.
 
    The author may be reached as becker@scyld.com, or C/O
    Scyld Computing Corporation, 410 Severn Ave., Suite 210, Annapolis MD 21403