Fix sequoia separate object direcory building problems.
diff --git a/board/amcc/sequoia/config.mk b/board/amcc/sequoia/config.mk
index 7713a72..e62b8d3 100644
--- a/board/amcc/sequoia/config.mk
+++ b/board/amcc/sequoia/config.mk
@@ -24,7 +24,7 @@
 # AMCC 440EPx Reference Platform (Sequoia) board
 #
 
-sinclude $(TOPDIR)/board/$(BOARDDIR)/config.tmp
+sinclude $(OBJTREE)/board/$(BOARDDIR)/config.tmp
 
 ifndef TEXT_BASE
 TEXT_BASE = 0xFFFA0000