OMAP3: Add support for OMAP3 die ID

Read and store OMAP3 die ID in U-Boot environment.

Signed-off-by: Dirk Behme <dirk.behme@googlemail.com>
diff --git a/board/omap3/zoom1/zoom1.c b/board/omap3/zoom1/zoom1.c
index d67abf7..702f732 100644
--- a/board/omap3/zoom1/zoom1.c
+++ b/board/omap3/zoom1/zoom1.c
@@ -61,6 +61,7 @@
 int misc_init_r(void)
 {
 	power_init_r();
+	dieid_num_r();
 	return 0;
 }