OpenSSL License is applied for some source files, change to Apache 2

The following files

include/openssl/hpke.h
crypto/hpke/hpke.c
crypto/ec/asm/ecp_sm2p256-armv8.pl
crypto/chacha/asm/chacha-loongarch64.pl
still seem to be released under the OpenSSL License instead of the Apache 2 license.

Fixes #23570

Reviewed-by: Shane Lontis <shane.lontis@oracle.com>
Reviewed-by: Richard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/23576)

crypto/chacha/asm/chacha-loongarch64.pl

@@ -2,7 +2,7 @@
 # Author: Min Zhou <zhoumin@loongson.cn>
 # Copyright 2023 The OpenSSL Project Authors. All Rights Reserved.
 #
-# Licensed under the OpenSSL license (the "License").  You may not use
+# Licensed under the Apache License 2.0 (the "License").  You may not use
 # this file except in compliance with the License.  You can obtain a copy
 # in the file LICENSE in the source distribution or at
 # https://www.openssl.org/source/license.html

crypto/ec/asm/ecp_sm2p256-armv8.pl

@@ -1,7 +1,7 @@
 #! /usr/bin/env perl
 # Copyright 2023 The OpenSSL Project Authors. All Rights Reserved.
 #
-# Licensed under the OpenSSL license (the "License").  You may not use
+# Licensed under the Apache License 2.0 (the "License").  You may not use
 # this file except in compliance with the License.  You can obtain a copy
 # in the file LICENSE in the source distribution or at
 # https://www.openssl.org/source/license.html

crypto/hpke/hpke.c

@@ -1,7 +1,7 @@
 /*
  * Copyright 2022-2023 The OpenSSL Project Authors. All Rights Reserved.
  *
- * Licensed under the OpenSSL license (the "License").  You may not use
+ * Licensed under the Apache License 2.0 (the "License").  You may not use
  * this file except in compliance with the License.  You can obtain a copy
  * in the file LICENSE in the source distribution or at
  * https://www.openssl.org/source/license.html

include/openssl/hpke.h

@@ -1,7 +1,7 @@
 /*
  * Copyright 2022-2023 The OpenSSL Project Authors. All Rights Reserved.
  *
- * Licensed under the OpenSSL license (the "License").  You may not use
+ * Licensed under the Apache License 2.0 (the "License").  You may not use
  * this file except in compliance with the License.  You can obtain a copy
  * in the file LICENSE in the source distribution or at
  * https://www.openssl.org/source/license.html