95dasd_mod: make dasd_cio_free optional

dasd_cio_free is a RedHat-specific tool, so make it optional.

Signed-off-by: Hannes Reinecke <hare@suse.de>

modules.d/95dasd_mod/module-setup.sh

@@ -23,6 +23,7 @@ installkernel() {
 # called by dracut
 install() {
     inst_hook cmdline 31 "$moddir/parse-dasd-mod.sh"
-    inst_multiple dasd_cio_free grep sed seq
+    inst_multiple grep sed seq
+    inst_multiple -o dasd_cio_free
 }
 

modules.d/95dasd_mod/parse-dasd-mod.sh

@@ -15,4 +15,6 @@ if [ -n "$mod_args" ]; then
 fi
 
 unset dasd_arg
-dasd_cio_free
+if [ -x /sbin/dasd_cio_free ] ; then
+    dasd_cio_free
+fi