Revert "drm/amd/display: Unblank hubp based on plane visibility"

Revert "drm/amd/display: Unblank hubp based on plane visibility"

This reverts commit 2a954ee50e6f9c66960be58f4b6058f02ef91760

[Why]
We are not implementing the planned new HW sequence
to disable HUBP.

[How]
Revert most related changes to minimize possibility
of regression.

Signed-off-by: Wesley Chalmers <Wesley.Chalmers@amd.com>
Reviewed-by: Martin Leung <Martin.Leung@amd.com>
Acked-by: Qingqing Zhuo <Qingqing.Zhuo@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>