[U-Boot] [RFC] MAKEALL: Fix case substitution for old bash

[York Sun]

Bash ver 3.x doesn't support the parameter expansion with case
substitution. Use tr instead.

Signed-off-by: York Sun <yorksun at freescale.com>
---
I am not sure if using 'tr' is a good idea. Any suggestion is welcomed.

 MAKEALL |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/MAKEALL b/MAKEALL
index c1d8957..ac92ef6 100755
--- a/MAKEALL
+++ b/MAKEALL
@@ -664,7 +664,7 @@ build_target() {
 	export BUILD_DIR="${output_dir}"
 
 	target_arch=$(get_target_arch ${target})
-	eval cross_toolchain=\$CROSS_COMPILE_${target_arch^^}
+	eval cross_toolchain=\$CROSS_COMPILE_`echo $target_arch | tr '[:lower:]' '[:upper:]'`
 	if [ "${cross_toolchain}" ] ; then
 	    MAKE="make CROSS_COMPILE=${cross_toolchain}"
 	elif [ "${CROSS_COMPILE}" ] ; then
-- 
1.7.9.5