drm/amd/powerplay: add interface to notify memory pool location (v2)

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>