This reverts commit 5b1c536eee.
For normal case, we connected two HDMI monitors, one for SOS, another for UOS.
Previously UOS has problem when only see one display, it was the bug of
user space driver, then to work around this issue, submit temp patch to let
UOS see two displays.
From latest info, after switch to use github latest user spce driver in stable
branch, such problem was resolved. Then we need revert previous workaround
patch, otherwise, UOS will show on both HDMI1 and HDMI2.
4a1f922242