[dm][dvfs] support Dynamic Voltage and Frequency Scaling (DVFS)

1. Support DVFS and finsh cmd, there are 6 governors:
   - conservative
   - freedom
   - performance
   - powersave
   - schedutil
2. Support DVFS for SCMI.
3. Port the Cooling device for DVFS.
4. Port the PM with DVFS.

Signed-off-by: GuEe-GUI <2991707448@qq.com>

components/drivers/thermal/SConscript

@@ -13,6 +13,9 @@ src = ['thermal.c', 'thermal_dm.c']
 if GetDepend(['RT_THERMAL_SCMI']):
     src += ['thermal-scmi.c']
 
+if GetDepend(['RT_THERMAL_COOL_DVFS']):
+    src += ['thermal-cool-dvfs.c']
+
 if GetDepend(['RT_THERMAL_COOL_PWM_FAN']):
     src += ['thermal-cool-pwm-fan.c']