msm: camera: isp: Set no memory retention

Set the memory retention flags for certain hardware clocks to
save power. Memory does not need to be retained for these
clocks since the driver reinitializes the vfe hardware
whenever the clocks are turned on.

CRs-Fixed: 1044373
Change-Id: Idea83ef287710add893b48af0ecd9465e4ff7a98
Signed-off-by: Shubhraprakash Das <sadas@codeaurora.org>