mm-video: venc: restrict codec level based on target specific macro

Without this change, call for supported codec levels for
different codec profile returned same for different chipset.

The change will now return different codec levels supported
for different chipset.This change will fix CTS case.

Change-Id: I2da19265b5b9360aae363b2b43fe83b8f007fc96
CRs-Fixed: 572716
vidc: venc: Add support for AVCProfileConstrainedBaseline

This change adds AVCProfileConstrainedBaseline profile
support for H264 encoder. OMX Client can now set this
profile to get required profile settings in SPS NAL unit
from video component.

CRs-Fixed:525412

Change-Id: Id15f620cd3a39b199b2750db92ac1c23bc083c88