msm: camera: Decouple the ISPIF component from sensor

Ispif is a separate hardware block. Decouple
it from sensors so that it can be controlled for various
camera usecases.

Change-Id: I539fcb4166edc7a14d15a94c2f7f56b2f196a971
Signed-off-by: Nishant Pandit <npandit@codeaurora.org>