strip ".ko" from the ndriver name

git-svn-id: https://svn.code.sf.net/p/xcat/code/xcat-core/trunk@6660 8638fb3e-16cb-4fca-ae20-7b5d299a9bcd

xCAT-server/share/xcat/netboot/rh/genimage

@@ -491,6 +491,8 @@ sub mkinitrd_dracut {
     cp("$fullpath/dracut/check", $dracutmpath);
     chmod($perm&07777, "$dracutmpath/check");
 
+    foreach (@ndrivers) { s/\.ko$//; }
+
     my $add_drivers = join(' ', @ndrivers);
     my $DRACUTCONF;