drm/amd/display: Add IPS residency capture helpers to dc_dmub_srv

This enables starting and stopping IPS residency measurements
and querying the IPS residency information consisting of residency
percent, entry counter, total time active & inactive, and histograms
for the specified IPS mode.

Reviewed-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Reviewed-by: Aric Cyr <aric.cyr@amd.com>
Signed-off-by: Ovidiu Bunea <Ovidiu.Bunea@amd.com>
Signed-off-by: Fangzhi Zuo <jerry.zuo@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>