Do not check for dkms if called from dkms

the recursive calls slowed down the configure script significantly

Signed-off-by: Andreas Beckmann <anbe@debian.org>

Author: anbe42

configure

@@ -348,7 +348,7 @@ do
     --disable-snmp-a*)   SKIPSNMP=1 ;;
     --disable-net-snmp*) SKIPSNMP=1 ;;
     --disable-dkms*)     SKIPDKMS=1 ;;
-    --from-dkms-conf*) ;;
+    --from-dkms-conf*)   SKIPDKMS=1 ;;
     --make) echo called from make; CARGS=`echo $CARGS | sed s/--make//g` ;;
     -Werror) KOPTS="$KOPTS -Werror" ;;
     --help|-h) show_help ;;