DF-1297 ci_thermal_setup_fan_table divide-by-zero harness
VBIOS usTMin=2500 usTMed=2500 usTHigh=9000  duty100=100
=> t_diff1 = usTMed-usTMin = 0   (kernel divides by this)
SIGFPE caught: integer divide-by-zero on t_diff1 == 0
In-kernel equivalent: CPU trap 0 (#DE) -> kernel panic
RESULT: divide-by-zero CONFIRMED at ci_smumgr.c:2165
RUN_EXIT=0