msm: camera: ife: Assign primary RDI during start HW

This change sets primary RDI source and out resources for a
particular RDI only Context. This information
is utilized during start HW resource to tell the driver
if it should subscribe to IRQs.

CRs-Fixed: 2521064
Change-Id: Ia5567b4432603db993c4783e60721be144c619f9
Signed-off-by: Vishalsingh Hajeri <vhajeri@codeaurora.org>