drm/amd/display: add more pipe resource interfaces

drm/amd/display: add more pipe resource interfaces

Redesign pipe resource interfaces in resource.h file. The new interface
design addresses the issue with lack of pipe topology encapsulation and
lack of pipe accessors.

Reviewed-by: Jun Lei <jun.lei@amd.com>
Acked-by: Hamza Mahfooz <hamza.mahfooz@amd.com>
Signed-off-by: Wenjing Liu <wenjing.liu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>