thermal: Enable thermal warm reset

Bug: 144071725
Test: ramoops exists after an intended triggered thermal shutdown
1) trigger thermal shutdown (temperature varies on different platform)
$ adb shell "echo 59100 > /sys/devices/virtual/thermal/tz-by-name/skin-therm-monitor/emul_temp"
2) verify ramoops exist after thermal shutdown
$ adb shell ls /sys/fs/pstore/console-ramoops-0
$ adb shell ls /sys/fs/psotre/pmsg-ramoops-0
Change-Id: I2f3fc4976ab4edf526e137ae4b3a03113db0e97b