tizi: enable fan for shutdown (#27890)

* tizi: enable fan for shutdown

* Update system/hardware/tici/hardware.py

---------

Co-authored-by: Comma Device <device@comma.ai>
old-commit-hash: 8f1753aaab

system/hardware/tici/hardware.py

@@ -467,10 +467,10 @@ class Tici(HardwareBase):
     os.system("sudo chmod a+w /dev/kmsg")
 
     # TODO: remove the if once agnos 7 ships
-    # Turn off fan, turned on by the ABL
+    # Ensure fan gpio is enabled so fan runs until shutdown, also turned on at boot by the ABL
     if os.path.exists('/sys/class/gpio/gpio49/'):
       gpio_init(GPIO.SOM_ST_IO, True)
-      gpio_set(GPIO.SOM_ST_IO, 0)
+      gpio_set(GPIO.SOM_ST_IO, 1)
 
     # *** IRQ config ***