treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 484

Based on 1 normalized pattern(s):

this source code is licensed under general public license version 2

extracted by the scancode license scanner the SPDX license identifier

GPL-2.0-only

has been chosen to replace the boilerplate/reference in 5 file(s).

Signed-off-by: Thomas Gleixner <[e-mail]>
Reviewed-by: Allison Randal <[e-mail]>
Reviewed-by: Enrico Weigelt <[e-mail]>
Cc: [e-mail]
Link: https://lkml.kernel.org/r/[e-mail]
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

include/linux/netfilter/nf_conntrack_h323_asn1.h

···
+/* SPDX-License-Identifier: GPL-2.0-only */
 /****************************************************************************
  * ip_conntrack_h323_asn1.h - BER and PER decoding library for H.323
  * 			      conntrack/NAT module.
  *
  * Copyright (c) 2006 by Jing Min Zhao <[e-mail]>
- *
- * This source code is licensed under General Public License version 2.
- *
  *
  * This library is based on H.225 version 4, H.235 version 2 and H.245
  * version 7. It is extremely optimized to decode only the absolutely

include/linux/netfilter/nf_conntrack_h323_types.h

···
+/* SPDX-License-Identifier: GPL-2.0-only */
 /* Generated by Jing Min Zhao's ASN.1 parser, May 16 2007
  *
  * Copyright (c) 2006 Jing Min Zhao <[e-mail]>
- *
- * This source code is licensed under General Public License version 2.
  */
 
 typedef struct TransportAddress_ipAddress {	/* SEQUENCE */

net/ipv4/netfilter/nf_nat_h323.c

···
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * H.323 extension for NAT alteration.
  *
  * Copyright (c) 2006 Jing Min Zhao <[e-mail]>
  * Copyright (c) 2006-2012 Patrick McHardy <[e-mail]>
- *
- * This source code is licensed under General Public License version 2.
  *
  * Based on the 'brute force' H.323 NAT module by
  * Jozsef Kadlecsik <[e-mail]>

net/netfilter/nf_conntrack_h323_main.c

···
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * H.323 connection tracking helper
  *
  * Copyright (c) 2006 Jing Min Zhao <[e-mail]>
  * Copyright (c) 2006-2012 Patrick McHardy <[e-mail]>
- *
- * This source code is licensed under General Public License version 2.
  *
  * Based on the 'brute force' H.323 connection tracking module by
  * Jozsef Kadlecsik <[e-mail]>

net/netfilter/nf_conntrack_h323_types.c

···
+// SPDX-License-Identifier: GPL-2.0-only
 /* Generated by Jing Min Zhao's ASN.1 parser, May 16 2007
  *
  * Copyright (c) 2006 Jing Min Zhao <[e-mail]>
- *
- * This source code is licensed under General Public License version 2.
  */
 
 static const struct field_t _TransportAddress_ipAddress[] = {	/* SEQUENCE */