Print AudioBoardID ADC value

Signed-off-by: Daniel Schaefer <dhs@frame.work>

Author: JohnAZoidberg

framework_lib/src/chromium_ec/mod.rs

@@ -602,6 +602,10 @@ impl CrosEc {
                 is_present(false).to_string()
             }
         );
+        println!(
+            "    ADC Value (mV)     {:?}",
+            self.adc_read(Framework13Adc::AudioBoardId as u8)
+        );
         println!("  Touchpad:            {}", is_present(tp.is_some()));
 
         Ok(())