msm: VPU: Add Dual Output Support

Add new VPU capability to produce two output streams from one input.
The two outputs can have independent processing parameters like scaling,
resolution, etc.

Change-Id: I15214e6576b484eaedb4dfa7028848fb2746dd57
Signed-off-by: Ahmed Abdul-Salam <aabdulsa@codeaurora.org>