omap3: overo: Fix fdtfile test
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@herbrechtsmeier.net>
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 " \