thermal: Adjust CLOSE-SUB1 VSKIN equation

CLOSE-SUB1 will cause 5 degC VSKIN correlation gap for solar loading
case, so adding a check to prevent over prediction

Bug: 280447982
Test: adb shell "echo 50000 > dev/thermal/tz-by-name/outer_disp_therm/emul_temp"
      adb shell "echo 0 > dev/thermal/tz-by-name/outer_disp_therm/emul_temp"
Change-Id: I3679ca4a72aa3585a0a0718013006fff54918893
3 files changed