MAINTAINERS: update MM tree references

Describe the new kernel.org location of the MM trees.

Suggested-by: David Hildenbrand <[email protected]>
Cc: Muchun Song <[email protected]>
Cc: Greg Kroah-Hartman <[email protected]>
Cc: Miaohe Lin <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>

Author: akpm00

MAINTAINERS

@@ -12846,9 +12846,8 @@ M:	Andrew Morton <[email protected]>
 L:	[email protected]
 S:	Maintained
 W:	http://www.linux-mm.org
-T:	quilt https://ozlabs.org/~akpm/mmotm/
-T:	quilt https://ozlabs.org/~akpm/mmots/
-T:	git git://github.com/hnaz/linux-mm.git
+T:	git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
+T:	quilt git://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new
 F:	include/linux/gfp.h
 F:	include/linux/memory_hotplug.h
 F:	include/linux/mm.h