msm: isp: Fix composite interrupts and offline config

1. Remove composite interrupt configuration as VFE1
   registers are double buffered.
2. Change fetch engine configuration

Change-Id: Ia5fa4ed17c62d9cf100dddf52575eda2d7805a4f
Signed-off-by: Abhishek Kondaveeti <akondave@codeaurora.org>