drm/amd/pm: Remove CPU virtual address notification in aldebaran

PPSMC_MSG_SetSystemVirtualDramAddrHigh/Low messages are not handled by
PMFW in aldebaran

Signed-off-by: Lijo Lazar <Lijo.Lazar@amd.com>
Reviewed-by: Kenneth Feng <Kenneth.Feng@amd.com>
Reviewed-by: Feifei Xu <Feifei.Xu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>