drm/amd/pm: Only primary die supports power data

On aldebaran, only primary die fetches valid power data. Show
power/energy values as 0 on secondary die. Also, power limit should not
be set through secondary die.

Signed-off-by: Lijo Lazar <lijo.lazar@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>