Introduce framebuffers LOCK/UNLOCK macros

Signed-off-by: Carlos Rafael Giani <dv@pseudoterminal.org>
Remove memcpy fallback , replaced by condition wait

Signed-off-by: Carlos Rafael Giani <dv@pseudoterminal.org>
Cleanup

Signed-off-by: Carlos Rafael Giani <dv@pseudoterminal.org>