[PATCH] mm: Ensure proper alignment for node_remap_start_pfn

While reserving KVA for lmem_maps of node, we have to make sure that
node_remap_start_pfn[] is aligned to a proper pmd boundary.
(node_remap_start_pfn[] gets its value from node_end_pfn[])

Signed-off-by: Ravikiran Thirumalai <kiran@scalex86.org>
Signed-off-by: Shai Fultheim <shai@scalex86.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>