drm/amd/pm: Fill max mem bw & total app clk counter

Fill max memory bandwidth and total app clock counter to metrics v1_7

v2: Remove unnecessary check

v3: Add app clock counter support for apu

Signed-off-by: Asad Kamal <asad.kamal@amd.com>
Reviewed-by: Lijo Lazar <lijo.lazar@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>