scripts/contrib/*: fix arithmetic bashism

Apparently $[...] isn't valid in dash, so use $((...)) instead for
mkefidisk.sh and ddimage that both start with $!/bin/sh.

(From OE-Core rev: d509739ca54e6b70f2dcc216b831fc02c64293a6)

Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

2 files changed, 2 insertions, 2 deletions

diff --git a/scripts/contrib/ddimage b/scripts/contrib/ddimage
index ab1d4c7b10..93ebeafc31 100755
--- a/scripts/contrib/ddimage
+++ b/scripts/contrib/ddimage
@@ -39,7 +39,7 @@ device_details() {
                 echo "   model: UNKNOWN"
         fi
         if [ -f "/sys/class/block/$DEV/size" ]; then
-                echo "    size: $[$(cat /sys/class/block/$DEV/size)*BLOCK_SIZE] bytes"
+                echo "    size: $(($(cat /sys/class/block/$DEV/size) * $BLOCK_SIZE)) bytes"
         else
                 echo "    size: UNKNOWN"
         fi
diff --git a/scripts/contrib/mkefidisk.sh b/scripts/contrib/mkefidisk.sh
index 0c15104bb3..bcc2411ca2 100755
--- a/scripts/contrib/mkefidisk.sh
+++ b/scripts/contrib/mkefidisk.sh
@@ -64,7 +64,7 @@ function device_details() {
                 echo "   model: UNKNOWN"
         fi
         if [ -f "/sys/class/block/$DEV/size" ]; then
-                echo "    size: $[$(cat /sys/class/block/$DEV/size)*BLOCK_SIZE] bytes"
+                echo "    size: $(($(cat /sys/class/block/$DEV/size) * $BLOCK_SIZE)) bytes"
         else
                 echo "    size: UNKNOWN"
         fi