MX31: Add NAND SPL boot support to i.MX31 PDK board.

Signed-off-by: Magnus Lilja <lilja.magnus@gmail.com>
diff --git a/MAKEALL b/MAKEALL
index e6f6c14..f2d3b6f 100755
--- a/MAKEALL
+++ b/MAKEALL
@@ -555,6 +555,7 @@
 	imx31_phycore_eet	\
 	mx31ads			\
 	mx31pdk			\
+	mx31pdk_nand		\
 	qong			\
 	smdk6400		\
 "