This patch adds interface to notify memory pool location for smu.
It's to use msg SetSystemVirtualDramAddr and DramLogSetDramAddr can notify pool
location.

v2: add detailed info to describe this function
Signed-off-by: Huang Rui <ray.huang@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>