ARM: dts: msm: Change csi clock voting from ispif node

ISPIF hardware also needs csi clock along with vfe clock, but csi
hardware controls clock rates hence changed clock control type
so that ispif won't alter clock rate set by csi.

CRs-Fixed: 972998
Change-Id: I6a99fa6961e9205d7d9ccb470873c26adde8a91f
Signed-off-by: Sagar Gore <sgore@codeaurora.org>
Signed-off-by: Shubhraprakash Das <sadas@codeaurora.org>