tegra20: enable SPL for tegra20 boards

Add SPL options to tegra20 config files and enable SPL build for
tegra20 boards.  Also remove redundant code from u-boot that is not
contained in SPL.

Signed-off-by: Allen Martin <amartin@nvidia.com>
Acked-by: Stephen Warren <swarren@wwwdotorg.org>
Tested-by: Thierry Reding <thierry.reding@avionic-design.de>
Signed-off-by: Tom Warren <twarren@nvidia.com>
diff --git a/Makefile b/Makefile
index 7d6f408..53dbdd3 100644
--- a/Makefile
+++ b/Makefile
@@ -381,6 +381,15 @@
 ALL-$(CONFIG_SPL) += $(obj)spl/u-boot-spl.bin
 ALL-$(CONFIG_OF_SEPARATE) += $(obj)u-boot.dtb $(obj)u-boot-dtb.bin
 
+# enable combined SPL/u-boot/dtb rules for tegra
+ifeq ($(SOC),tegra20)
+ifeq ($(CONFIG_OF_SEPARATE),y)
+ALL-y += $(obj)u-boot-dtb-tegra.bin
+else
+ALL-y += $(obj)u-boot-nodtb-tegra.bin
+endif
+endif
+
 all:		$(ALL-y) $(SUBDIR_EXAMPLES)
 
 $(obj)u-boot.dtb:	$(obj)u-boot