90dm: install more device mapper kernel modules

modules.d/90dm/dm-pre-udev.sh

@@ -1 +1 @@
-modprobe dm_mod
+modprobe dm_mod 

modules.d/90dm/install

@@ -1,4 +1,5 @@
 #!/bin/bash
 
-inst_hook pre-udev 30 "$moddir/dm-pre-udev.sh"
+modinfo -k $kernel dm_mod >/dev/null 2>&1 && \
+    inst_hook pre-udev 30 "$moddir/dm-pre-udev.sh"
 

modules.d/90dm/installkernel

@@ -1,2 +1,9 @@
 #!/bin/bash
-instmods dm_mod
+
+for i in \
+    dm-snapshot dm-delay dm-mirror dm-mod dm-queue-length \
+    dm-region-hash dm-round-robin dm-service-time dm-snapshot \
+    ; do
+    modinfo -k $kernel $i >/dev/null 2>&1 && instmods $i
+done
+