rbd: get rid of img_req->copyup_pages

The initiating object request is the proper owner -- save a bit of
space.

Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Reviewed-by: Alex Elder <elder@linaro.org>
This commit is contained in:
Ilya Dryomov 2018-01-20 10:30:11 +01:00
commit f9dcbc44cd