s390: use generic bugs.h header file

Use the generic bugs.h header file. Except for an
excellent comment the header files are identical.
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>

arch/s390/include/asm/bugs.h

-/* SPDX-License-Identifier: GPL-2.0 */
-/*
- *  S390 version
- *    Copyright IBM Corp. 1999
- *    Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com)
- *
- *  Derived from "include/asm-i386/bugs.h"
- *    Copyright (C) 1994  Linus Torvalds
- */
-
-/*
- * This is included by init/main.c to check for architecture-dependent bugs.
- *
- * Needs:
- *      void check_bugs(void);
- */
-
-static inline void check_bugs(void)
-{
-  /* s390 has no bugs ... */
-}