90lvm/module-setup.sh: ignore DM_UDEV_DISABLE_DISK_RULES_FLAG=1

Ignore logical volumes, which have DM_UDEV_DISABLE_DISK_RULES_FLAG=1
set for the generation of hostonly cmdline parameter.

modules.d/90lvm/module-setup.sh

@@ -11,9 +11,9 @@ check() {
     [[ $debug ]] && set -x
 
     check_lvm() {
-        unset DM_VG_NAME
-        unset DM_LV_NAME
-        eval $(udevadm info --query=property --name=$1|egrep '(DM_VG_NAME|DM_LV_NAME)=')
+        local DM_VG_NAME DM_LV_NAME DM_UDEV_DISABLE_DISK_RULES_FLAG
+        eval $(udevadm info --query=property --name=$1|egrep '(DM_VG_NAME|DM_LV_NAME|DM_UDEV_DISABLE_DISK_RULES_FLAG)=')
+        [[ "$DM_UDEV_DISABLE_DISK_RULES_FLAG" = "1" ]] && return 1
         [[ ${DM_VG_NAME} ]] && [[ ${DM_LV_NAME} ]] || return 1
         if ! strstr " ${_activated[*]} " " ${DM_VG_NAME}/${DM_LV_NAME} "; then
             if ! [[ $kernel_only ]]; then