chiron: Add approximate underclock energy cost

Calculated by arch/arm/boot/dts/qcom/msm8998.dtsi
* cluster0 (230000Hz): 56 / 65 = 86.15%
* cluster1 (230000Hz): 116 / 129 = 89.92%

Change-Id: I0621613d8f16d4ba61176bb7772a0971d7a0835d

overlay/frameworks/base/core/res/res/xml/power_profile.xml

@@ -28,6 +28,7 @@
         <value>4</value>
     </array>
     <array name="cpu.core_speeds.cluster0">
+        <value>230000</value>
         <value>300000</value>
         <value>364800</value>
         <value>441600</value>
@@ -52,6 +53,7 @@
         <value>1900800</value>
     </array>
     <array name="cpu.core_power.cluster0">
+        <value>24.54</value>
         <value>28.48</value>
         <value>28.57</value>
         <value>28.59</value>
@@ -76,6 +78,7 @@
         <value>72.99</value>
     </array>
     <array name="cpu.core_speeds.cluster1">
+        <value>230000</value>
         <value>300000</value>
         <value>345600</value>
         <value>422400</value>
@@ -109,6 +112,7 @@
         <value>2457600</value>
     </array>
     <array name="cpu.core_power.cluster1">
+        <value>34.67</value>
         <value>38.55</value>
         <value>40.25</value>
         <value>43.64</value>