s390/mm: make vmemmap_free() only for CONFIG_MEMORY_HOTPLUG available

Get rid of this W=1 compile warning:

arch/s390/mm/vmem.c:502:6: warning: no previous prototype for ‘vmemmap_free’ [-Wmissing-prototypes]
  502 | void vmemmap_free(unsigned long start, unsigned long end,
      |      ^~~~~~~~~~~~

Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
This commit is contained in:
Heiko Carstens 2023-10-16 12:17:59 +02:00 • committed by Vasily Gorbik
commit 4f62c6e301