dracut: add_drivers from the command line should add up to the conffile

diff --git a/dracut b/dracut
index b16e205..8c0adad 100755 (executable)
--- a/dracut
+++ b/dracut
@@ -143,7 +143,7 @@ fi
 [[ $omit_dracutmodules_l ]] && omit_dracutmodules=$omit_dracutmodules_l
 [[ $add_dracutmodules_l ]] && add_dracutmodules="$add_dracutmodules $add_dracutmodules_l"
 [[ $drivers_l ]] && drivers=$drivers_l
-[[ $add_drivers_l ]] && add_drivers=$add_drivers_l
+[[ $add_drivers_l ]] && add_drivers="$add_drivers $add_drivers_l"
 [[ $filesystems_l ]] && filesystems=$filesystems_l
 [[ $drivers_dir_l ]] && drivers_dir=$drivers_dir_l
 [[ $fw_dir_l ]] && fw_dir=$fw_dir_l