msm: camera: isp: Enable CGC override for read intf

Propogated change to msm47 to override CGC while
doing fetch engine config. This change will enable
Bus read interface clock to use VFE in offline mode.
CGC reset will happen as part of close node.

Change-Id: I1e79210178a6ed822d4a76bab7c5c9f73fb27b95
Signed-off-by: Shashank Menon <smmenon@codeaurora.org>