drm/amd/pm: Provide energy data in 15.625mJ units

Publish energy data in 15.625mJ unit for SMU v13.0.6. The same unit is
used in Aldebaran also.

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