Docs: Adding clarification to cpu.active

Bug: 25450159
Change-Id: If53eac9fef7fcb591fc10bf89532a50a7b5a275d
diff --git a/src/devices/tech/power/values.jd b/src/devices/tech/power/values.jd
index 8c6d4ac..912b2b6 100644
--- a/src/devices/tech/power/values.jd
+++ b/src/devices/tech/power/values.jd
@@ -238,9 +238,10 @@
   <td>cpu.active</td>
   <td>Additional power used by CPUs when running at different speeds.</td>
   <td>100mA, 120mA, 140mA, 160mA, 200mA</td>
-  <td>Set the max speed in the kernel to each of the allowed speeds and peg the
-  CPU at that speed. The number of entries here correspond to the number of
-  entries in cpu.speeds, in the same order.</td>
+  <td>Value represents the power used by the CPU rails when running at different
+  speeds. Set the max speed in the kernel to each of the allowed speeds and peg
+  the CPU at that speed. The number and order of entries correspond to the
+  number and order of entries in cpu.speeds.</td>
 </tr>
 
 <tr>