Pull the EMR calculation into small helpers.
Signed-off-by: NVille Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230125185234.21599-5-ville.syrjala@linux.intel.comReviewed-by: NVinod Govindapillai <vinod.govindapillai@intel.com>