Remove bash-ism from post-installation script which breaks install

This was introduced with commit
2b87027 from
#8008

Signed-off-by: Ronan Keryell <[email protected]>

Author: keryell

src/CMake/config/postinst.in

@@ -80,12 +80,12 @@ done
 rmmodules
 
 DRACUT_CONF_PATH=/etc/dracut.conf.d
-if [ -e $DRACUT_CONF_PATH ] && [ $alveo == 1]; then
+if [ -e $DRACUT_CONF_PATH ] && [ $alveo -eq 1 ]; then
     install -m 644 /usr/src/xrt-@XRT_VERSION_STRING@/driver/xocl/userpf/xocl.dracut.conf $DRACUT_CONF_PATH
     install -m 644 /usr/src/xrt-@XRT_VERSION_STRING@/driver/xocl/mgmtpf/xclmgmt.dracut.conf $DRACUT_CONF_PATH
 fi
 
-if [ $alveo == 0]; then
+if [ $alveo -eq 0 ]; then
     echo "Skipping XRT Alveo driver install"
     exit 0
 fi