drm/amd/disply/dc: add resource support for DCE8 APUs (v2)

Add the appropriate resources for APUs:
KV:    4 pipes, 7 dig, 3 PPLLs
KB/ML: 2 pipes, 6 dig, 2 PPLLs

v2: rebase changes

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>