Revert "drm/amd/display: Add left edge pixel for YCbCr422/420 + ODM pipe split"

[Why/How]
A regression was identified with the change to add left edge pixel for
YCbCr422/420 + ODM combine cases.

This reverts commit 288c0254



Cc: Mario Limonciello <mario.limonciello@amd.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
Reviewed-by: Martin Leung <martin.leung@amd.com>
Acked-by: Aurabindo Pillai <aurabindo.pillai@amd.com>
Signed-off-by: George Shen <george.shen@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>