x86, mm: Move down find_early_table_space()

It will need to call split_mem_range().
Move it down after that to avoid extra declaration.

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Link: http://lkml.kernel.org/r/1353123563-3103-4-git-send-email-yinghai@kernel.org


Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>