[hm] When leaving bandgap, probe now goes offline if close to max ADC
[hm] When leaving bandgap, probe now goes offline if close to max ADC

Actually adds the noise value (shifted up to TEMP_OVERSAMPLE_BITS)
and if that is within 1LSB of max, set to TSTATUS_NONE

shmick/HeaterMeter,CapnBry/HeaterMeter,CapnBry/HeaterMeter,CapnBry/HeaterMeter,shmick/HeaterMeter,shmick/HeaterMeter,CapnBry/HeaterMeter,CapnBry/HeaterMeter,CapnBry/HeaterMeter,CapnBry/HeaterMeter,shmick/HeaterMeter,shmick/HeaterMeter,shmick/HeaterMeter,shmick/HeaterMeter