machine_select: Add HW23-DLM board

machine_select

@@ -8,12 +8,13 @@ HW18="nrhw18 - NB1800"
 HW20="nrhw20 - NB1601"
 HW21="nmhw21 - VCU1"
 HW23="nmhw23 - VCU2"
+DLM="nmhw23-dlm - VCU2-DLM variant"
 HW24="nrhw24 - NB800 facelift"
 HW25="hw25 - TC Router"
 HW26="hw26 - NG800"
 
 set -a
-select opt in HW16 HW18 HW20 HW21 HW23 HW24 HW25 HW26
+select opt in HW16 HW18 HW20 HW21 HW23 DLM HW24 HW25 HW26
 do
     case $opt in
         HW16)
@@ -36,6 +37,10 @@ do
             MACHINE=imx8-nmhw23
             break
             ;;
+        DLM)
+            MACHINE=imx8-nmhw23-dlm
+            break
+            ;;
         HW24)
             MACHINE=am335x-nmhw24
             break