msm: camera: ife: Add check for DSP enabled in acquire

This change adds a check if DSP is enabled to ensure lower
index IFE cores are acquired since only they support DSP
mode.

CRs-Fixed: 2632139
Change-Id: Ib1be26be9d5afd83f565ddf5adb989ef463d8b8d
Signed-off-by: Venkat Chinta <vchinta@codeaurora.org>