s3:smbd: don't pass an unused smb_fname to reopen_from_procfd()

s3:smbd: don't pass an unused smb_fname to reopen_from_procfd()

Both callers pass in a helper variable that points to
fsp->fsp_name and it was only used for a debug message,
so we can simply use fsp_str_dgb() instead.

Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>