95nfs: Install less module if hostonly mode is strict

For strict hostonly mode, only install currently loaded modules instead
of a bunch of driver that may not be needed.

Signed-off-by: Kairui Song <kasong@redhat.com>

modules.d/95nfs/module-setup.sh

@@ -38,7 +38,7 @@ depends() {
 
 # called by dracut
 installkernel() {
-    hostonly='' instmods =net/sunrpc =fs/nfs ipv6 nfs_acl nfs_layout_nfsv41_files
+    hostonly=$(optional_hostonly) instmods =net/sunrpc =fs/nfs ipv6 nfs_acl nfs_layout_nfsv41_files
 }
 
 cmdline() {