drm/rockchip: Get rid of some unnecessary code

Current code implements prepare_fb and cleanup_fb callbacks only to
grab/release fb references, which is already done by atomic framework
when creating/destryoing plane state. Let's remove these
unused bits.

Signed-off-by: Tomasz Figa <tfiga@chromium.org>
This commit is contained in:
Tomasz Figa 2016-09-14 21:54:55 +09:00 • committed by Sean Paul
commit 65bcb6bcc8