mm/page_alloc.c: deduplicate __memblock_free_early() and memblock_free()

Link: http://lkml.kernel.org/r/C8ECE1B7A767434691FEEFA3A01765D72AFB8E78@MX203CL03.corp.emc.com


Signed-off-by: Wentao Wang <witallwang@gmail.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Mike Rapoport <rppt@linux.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>