Revert "msm: vidc: Change governor to assume two-stage encoding"

Venus decided to stick with single-stage encoding for most usecases.
The usecases in which two-stage encoding is enabled isn't of practical
use to us.

Change-Id: I4c063dffc80504909095dc2d102cf7424f77537d
Signed-off-by: Deva Ramasubramanian <dramasub@codeaurora.org>