microblaze: Use active regions

Register lowmem active regions.

Signed-off-by: Michal Simek <monstr@monstr.eu>
diff --git a/arch/microblaze/Kconfig b/arch/microblaze/Kconfig
index 8e9da3d..3267cc5 100644
--- a/arch/microblaze/Kconfig
+++ b/arch/microblaze/Kconfig
@@ -1,6 +1,7 @@
 config MICROBLAZE
 	def_bool y
 	select HAVE_MEMBLOCK
+	select HAVE_MEMBLOCK_NODE_MAP
 	select HAVE_FUNCTION_TRACER
 	select HAVE_FUNCTION_TRACE_MCOUNT_TEST
 	select HAVE_FUNCTION_GRAPH_TRACER
@@ -30,6 +31,9 @@
 config ZONE_DMA
 	def_bool y
 
+config ARCH_POPULATES_NODE_MAP
+	def_bool y
+
 config RWSEM_XCHGADD_ALGORITHM
 	bool