linux/elfcore.h: hide kernel functions

The declarations for elf_core_extra_phdrs() et al got added on the
wrong side of #ifdef __KERNEL__ in linux/elfcore.h so they leak into
the user header copy and we get a warning at build time about it.
Signed-off-by: Roland McGrath <roland@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

include/linux/elfcore.h

@@ -150,8 +150,6 @@ static inline int elf_core_copy_task_xfpregs(struct task_struct *t, elf_fpxregse
 }
 #endif
 
-#endif /* __KERNEL__ */
-
 /*
  * These functions parameterize elf_core_dump in fs/binfmt_elf.c to write out
  * extra segments containing the gate DSO contents.  Dumping its
@@ -168,4 +166,6 @@ extern int
 elf_core_write_extra_data(struct file *file, size_t *size, unsigned long limit);
 extern size_t elf_core_extra_data_size(void);
 
+#endif /* __KERNEL__ */
+
 #endif /* _LINUX_ELFCORE_H */