ion: Revert upstream changes for now

Upstream has made changes to the ion framework which are not compatible
with qcom-added features. Revert these temporarily until a proper
integration can be done.

Revert to:
commit 083a1983
("clk: Check for failure at clk_change_rate")

Change-Id: Icaf38e89aa6a696d212a9a743482f9030abab9cf
Signed-off-by: Patrick Daly <pdaly@codeaurora.org>