ChangeLog entries for ppc64 gcm-aes.

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+2024-04-14  Niels Möller  <nisse@lysator.liu.se>
+
+       From Danny Tsen: Combined gcm-aes implementation for powerpc64.
+       * configure.ac: Define HAVE_NATIVE_gcm_aes_encrypt and
+       HAVE_NATIVE_gcm_aes_decrypt.
+       (asm_nettle_optional_list): Add gcm-aes-encrypt.asm,
+       gcm-aes-encrypt-2.asm, gcm-aes-decrypt.asm, and
+       gcm-aes-decrypt-2.asm.
+       * gcm-internal.h (_gcm_aes_encrypt, _gcm_aes_decrypt): Declare
+       internal functions, and define as dummy macros when not supported.
+       * gcm-aes128.c (gcm_aes128_encrypt): Use _gcm_aes_encrypt.
+       (gcm_aes128_decrypt): Use _gcm_aes_encrypt.
+       * gcm-aes192.c (gcm_aes192_encrypt, gcm_aes128_decrypt): Likewise.
+       * gcm-aes256.c (gcm_aes256_encrypt, gcm_aes256_decrypt): Likewise.
+       * Makefile.in (DISTFILES): Add gcm-internal.h.
+       * powerpc64/machine.m4 (GF_MUL): New macro.
+       * powerpc64/fat/gcm-aes-decrypt-2.asm: New file.
+       * powerpc64/fat/gcm-aes-encrypt-2.asm: New file.
+       * powerpc64/p8/gcm-aes-decrypt.asm: New file.
+       * powerpc64/p8/gcm-aes-encrypt.asm: New file.
+       * fat-setup.h (gcm_aes_crypt_func): New typedef.
+       * fat-ppc.c: Fat setup for gcm_aes_encrypt and gcm_aes_decrypt.
+       (gcm_aes_crypt_c): New nop implementation.
+
 2024-03-29  Niels Möller  <nisse@lysator.liu.se>
 
        * bswap-internal.h (nettle_bswap32_n): New inline function.