msm: vidc: Decide core and power mode for kona

Separate the decision process for each target.
Kona has only 1 core, so remove multicore checks.
Decide power config based on macroblocks per sec.

CRs-Fixed: 2384822
Change-Id: Ie4323f920c56e728a05741424e5a548affdbf0e1
Signed-off-by: Chinmay Sawarkar <chinmays@codeaurora.org>