msm: vidc: Differentiate between different types of loads

Consider only real-time load during admission control.
Remove upper limit for concurrent non-realtime load.
However, consider both types of loads while voting for
frequency.

CRs-Fixed: 2092800
Change-Id: Ie49a4542d3155533d37ba129600d6db9fc0fd2e4
Signed-off-by: Saurabh Kothawade <skothawa@codeaurora.org>