ALSA: isa: Add SPDX id lines to some files

Add SPDX-License-Identifier lines to several files where
they are missing, mostly in the sound/isa subdir.
Use GPL-2.0 as the id.

[ note: the same change applied to sound/hda/core/trace.c, too -- tiwai ]

Signed-off-by: Tim Bird <tim.bird@sony.com>
Link: https://patch.msgid.link/20260212195905.3726149-1-tim.bird@sony.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>

Author: tbird20d

sound/hda/core/trace.c

@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * tracepoint definitions for HD-audio core drivers
  */

sound/isa/gus/interwave-stb.c

@@ -1,2 +1,3 @@
+// SPDX-License-Identifier: GPL-2.0
 #define SNDRV_STB
 #include "interwave.c"

sound/isa/msnd/msnd_classic.c

@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /* The work is in msnd_pinnacle.c, just define MSND_CLASSIC before it. */
 #define MSND_CLASSIC
 #include "msnd_pinnacle.c"

sound/isa/opti9xx/opti92x-cs4231.c

@@ -1,2 +1,3 @@
+// SPDX-License-Identifier: GPL-2.0
 #define CS4231
 #include "opti92x-ad1848.c"

sound/isa/opti9xx/opti93x.c

@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #define OPTi93X
 #include "opti92x-ad1848.c"
 

sound/isa/sb/jazz16.c

@@ -1,14 +1,9 @@
-
+// SPDX-License-Identifier: GPL-2.0
 /*
  * jazz16.c - driver for Media Vision Jazz16 based soundcards.
  * Copyright (C) 2009 Krzysztof Helt <krzysztof.h1@wp.pl>
  * Based on patches posted by Rask Ingemann Lambertsen and Rene Herman.
  * Based on OSS Sound Blaster driver.
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License.  See the file COPYING in the main directory of this archive for
- * more details.
- *
  */
 
 #include <linux/init.h>

sound/isa/sb/sbawe.c

@@ -1,2 +1,3 @@
+// SPDX-License-Identifier: GPL-2.0
 #define SNDRV_SBAWE
 #include "sb16.c"