[U-Boot] [PATCH 1/5] omap3: overo: Fix fdtfile test

[Stefan Herbrechtsmeier]

Commit 12cc54376768461533b55ada1b0b6d4979f40579 'omap3: overo: Select
fdtfile for expansion board' wrongly missed the operator in the fdtfile
test. Update the test to only overwrite an empty fdtfile environment
variable.

Signed-off-by: Stefan Herbrechtsmeier <stefan at herbrechtsmeier.net>
---

 include/configs/omap3_overo.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/configs/omap3_overo.h b/include/configs/omap3_overo.h
index e66f306..b17e495 100644
--- a/include/configs/omap3_overo.h
+++ b/include/configs/omap3_overo.h
@@ -151,7 +151,7 @@
 			"run mmcboot;" \
 		"fi;" \
 		"if run loadzimage; then " \
-			"if test $fdtfile; then " \
+			"if test -z \"${fdtfile}\"; then " \
 				"setenv fdtfile omap3-${boardname}-${expansionname}.dtb;" \
 			"fi;" \
 			"if run loadfdt; then " \
-- 
2.1.0