memblock: Make memblock_alloc_try_nid() fallback to MEMBLOCK_ALLOC_ANYWHERE

memblock_alloc_nid() used to fallback to allocating anywhere by using
memblock_alloc() as a fallback.

However, some of my previous patches limit memblock_alloc() to the region
covered by MEMBLOCK_ALLOC_ACCESSIBLE which is not quite what we want
for memblock_alloc_try_nid().

So we fix it by explicitely using MEMBLOCK_ALLOC_ANYWHERE.

Not that so far only sparc uses memblock_alloc_nid() and it hasn't been updated
to clamp the accessible zone yet. Thus the temporary "breakage" should have
no effect.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

mm/memblock.c

diff --git a/mm/memblock.c b/mm/memblock.c
index 1802d97..9de5fcd 100644
--- a/mm/memblock.c
+++ b/mm/memblock.c
@@ -546,7 +546,7 @@
 
 	if (res)
 		return res;
-	return memblock_alloc(size, align);
+	return memblock_alloc_base(size, align, MEMBLOCK_ALLOC_ANYWHERE);
 }