drm/amd/display: Prevent invalid pipe connections

drm/amd/display: Prevent invalid pipe connections

[Description]
 - Prevent ODM pipe connections between pipes that are not part
   of the same plane when adding a plane to context
 - Re-attach child pipes of ODM slice about to be disconnected
   to prevent any lost pipes with invalid tops/bottoms
 - We cannot split if head_pipe is not in ODM. Preventing this
   avoids creating an invalid context with an invalid pipe.

Reviewed-by: Alvin Lee <alvin.lee2@amd.com>
Acked-by: Alex Hung <alex.hung@amd.com>
Signed-off-by: Ethan Bitnun <ethan.bitnun@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>