set max cpu core frequency (#38132)

cap cpu core frequency

(cherry picked from commit c01b8be968)

system/hardware/tici/hardware.py

@@ -313,6 +313,9 @@ class Tici(HardwareBase):
         continue
       gov = 'ondemand' if powersave_enabled else 'performance'
       sudo_write(gov, f'/sys/devices/system/cpu/cpufreq/policy{n}/scaling_governor')
+      if not powersave_enabled:
+        # cap max core freq to 1689 Mhz
+        sudo_write('1689600', f'/sys/devices/system/cpu/cpufreq/policy{n}/scaling_max_freq')
 
     # *** IRQ config ***