smb: client: do not query reparse points twice on symlinks

Save a roundtrip by getting the reparse point tag and buffer at once
in ->query_reparse_point() and then pass the buffer down to
->query_symlink().

Signed-off-by: Paulo Alcantara (SUSE) <pc@manguebit.com>
Signed-off-by: Steve French <stfrench@microsoft.com>