cifs: Re-order M-F Symlink code

This patch makes cosmetic changes. We group similar functions together
and separate out the protocol specific functions.

Signed-off-by: Sachin Prabhu <sprabhu@redhat.com>
Reviewed-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <smfrench@gmail.com>