[glibc] m68k: Fix build with -mcpu=68040 or higher (BZ 30740)

[glibc] m68k: Fix build with -mcpu=68040 or higher (BZ 30740)

[Adhemerval Zanella]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=b85880633f69b737050c22eede858f8c13bb2248

commit b85880633f69b737050c22eede858f8c13bb2248
Author: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Date:   Fri Aug 18 14:59:51 2023 -0300

    m68k: Fix build with -mcpu=68040 or higher (BZ 30740)
    
    GCC currently does not define __mc68020__ for -mcpu=68040 or higher,
    which memcpy/memmove assumptions.  Since this memory copy optimization
    seems only intended for m68020, disable for other m680X0 variants.
    
    Checked on a build for m68k-linux-gnu target mc68020 and mc68040.

Diff:
---
 sysdeps/m68k/m680x0/m68020/wordcopy.S |  1 -
 sysdeps/m68k/wordcopy.c               | 21 +++++++++++++++++++++
 2 files changed, 21 insertions(+), 1 deletion(-)

diff --git a/sysdeps/m68k/m680x0/m68020/wordcopy.S b/sysdeps/m68k/m680x0/m68020/wordcopy.S
deleted file mode 100644
index 4fb1a4518f..0000000000
--- a/sysdeps/m68k/m680x0/m68020/wordcopy.S
+++ /dev/null
@@ -1 +0,0 @@
-/* Empty, not needed.  */
diff --git a/sysdeps/m68k/wordcopy.c b/sysdeps/m68k/wordcopy.c
new file mode 100644
index 0000000000..f12d5b7803
--- /dev/null
+++ b/sysdeps/m68k/wordcopy.c
@@ -0,0 +1,21 @@
+/* Definitions for memory copy functions.  Motorola 680X0 version
+   Copyright (C) 2023 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library.  If not, see
+   <https://www.gnu.org/licenses/>.  */
+
+#ifndef __mc68020__
+# include <string/wordcopy.c>
+#endif