Revert "p1-common: remove tvout feature for now"

requires: https://gerrit.omnirom.org/7939 (merged)

This reverts commit fd9a74c7c9e00917ca862703e46ede4e1d7f16c5.

Change-Id: I3817c4beb3e2a06e9f2073d4fb9309ae4fddddb2