drm/amd/pm: Fix SMU v13.0.6 energy reporting

Energy counter should be reported in units of 15.259 uJ. Don't apply
any conversion.

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