[S390] check_bugs() should be inline.

Don't have functions in header files unless they are inline.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

include/asm-s390/bugs.h

@@ -16,7 +16,7 @@
  *      void check_bugs(void);
  */
 
-static void __init check_bugs(void)
+static inline void check_bugs(void)
 {
   /* s390 has no bugs ... */
 }