ppc64: FORCE_MAX_ZONEORDER is actually order + 1, from Dave Gibson

arch/ppc64/Kconfig

@@ -38,10 +38,11 @@ config FRAME_POINTER
 	default y
 
 # We optimistically allocate largepages from the VM, so make the limit
-# large enough (16MB)
+# large enough (16MB). This badly named config option is actually
+# max order + 1
 config FORCE_MAX_ZONEORDER
 	int
-	default "12"
+	default "13"
 
 source "init/Kconfig"