PS3: Fix memory hotplug

[Geoff Levand <geoffrey.levand@am.sony.com>]

A change was made to walk_memory_resource() in commit
4b119e21d0c66c22e8ca03df05d9de623d0eb50f that added a
check of find_lmb().  Add the corresponding lmb_add()
call to ps3_mm_add_memory() so that that check will
succeed.

This fixes the condition where the PS3 boots up with
just the 128 MiB of boot memory.

Signed-off-by: Geoff Levand <geoffrey.levand@am.sony.com>
---

Paul,

Please send this one upstream at your earliest convenience.

-Geoff

 arch/powerpc/platforms/ps3/mm.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/arch/powerpc/platforms/ps3/mm.c
+++ b/arch/powerpc/platforms/ps3/mm.c
@@ -317,6 +317,8 @@ static int __init ps3_mm_add_memory(void
 		return result;
 	}
 
+	lmb_add(start_addr, map.r1.size);
+
 	result = online_pages(start_pfn, nr_pages);
 
 	if (result)