net: rtl8139: Fill in SPDX tag

The rtl8139 driver is derived from Etherboot driver, which is in
turn derived from Linux 8139too driver added in Linux 2.2.18pre14.
An undocumented change in Linux 2.4.10.2 added a new field to the
driver, MODULE_LICENSE("GPL"); . According to current Linux kernel
licensing rules, Documentation/process/license-rules.rst, quote:

	"GPL"	Module is licensed under GPL version 2. This
		does not express any distinction between
		GPL-2.0-only or GPL-2.0-or-later. The exact
		license information can only be determined
		via the license information in the
		corresponding source files.

And since the code does not contain any "future" clause, the tag
is therefore GPL-2.0 only.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Joe Hershberger <joe.hershberger@ni.com>

diff --git a/drivers/net/rtl8139.c b/drivers/net/rtl8139.c
index 66591d0..1f08397 100644 (file)
--- a/drivers/net/rtl8139.c
+++ b/drivers/net/rtl8139.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * rtl8139.c : U-Boot driver for the RealTek RTL8139
  *
@@ -12,9 +13,6 @@
  * ported from the linux driver written by Donald Becker
  * by Rainer Bawidamann (Rainer.Bawidamann@informatik.uni-ulm.de) 1999
  *
- * This software may be used and distributed according to the terms
- * of the GNU Public License, incorporated herein by reference.
- *
  * changes to the original driver:
  * - removed support for interrupts, switching to polling mode (yuck!)
  * - removed support for the 8129 chip (external MII)