Fix compiling ed w/ WITHOUT_ED_CRYPTO...  These variables aren't
used..

Submitted by:   deeptech71 at gmail dot com
drm/ttm: Fix TTM buffer object refcount

This fixes memory leaks in the radeonkms driver.

Reviewed by:	Konstantin Belousov (kib@)
Tested by:	J.R. Oldroyd <jr@opal.com>