msm: vidc: Reorganize work mode, route and latency selection

Add kona specific work route & mode selection.
Work Stage should be decided before Route.
Enable and Set Low Latency only once, after deciding
Work Stage.

CRs-Fixed: 2370177
Change-Id: I26cc182f23b237c393341de5f3ef46286fd6873f
Signed-off-by: Chinmay Sawarkar <chinmays@codeaurora.org>