microblaze: Sync noMMU and MMU setup_memory

Both versions can use the same node to register NODE_DATA(0)
Signed-off-by: Michal Simek <monstr@monstr.eu>

arch/microblaze/mm/init.c

@@ -134,13 +134,8 @@ void __init setup_memory(void)
 	 * for 4GB of memory, using 4kB pages), plus 1 page
 	 * (in case the address isn't page-aligned).
 	 */
-#ifndef CONFIG_MMU
-	map_size = init_bootmem_node(NODE_DATA(0), PFN_UP(TOPHYS((u32)klimit)),
-					min_low_pfn, max_low_pfn);
-#else
-	map_size = init_bootmem_node(&contig_page_data,
+	map_size = init_bootmem_node(NODE_DATA(0),
 		PFN_UP(TOPHYS((u32)klimit)), min_low_pfn, max_low_pfn);
-#endif
 	memblock_reserve(PFN_UP(TOPHYS((u32)klimit)) << PAGE_SHIFT, map_size);
 
 	/* free bootmem is whole main memory */