adc: Convert logging to lg2

Change-Id: I6408725aa3a0eb79b0d2ee7fd0ee46d0f553d9ed
Signed-off-by: George Liu <liuxiwei@ieisystem.com>
diff --git a/src/adc/ADCSensor.hpp b/src/adc/ADCSensor.hpp
index 9a9050e..618c43f 100644
--- a/src/adc/ADCSensor.hpp
+++ b/src/adc/ADCSensor.hpp
@@ -9,10 +9,10 @@
 #include <boost/asio/steady_timer.hpp>
 #include <boost/asio/streambuf.hpp>
 #include <gpiod.hpp>
+#include <phosphor-logging/lg2.hpp>
 #include <sdbusplus/asio/connection.hpp>
 #include <sdbusplus/asio/object_server.hpp>
 
-#include <iostream>
 #include <memory>
 #include <optional>
 #include <string>
@@ -29,7 +29,7 @@
         line = gpiod::find_line(name);
         if (!line)
         {
-            std::cerr << "Error finding gpio: " << name << "\n";
+            lg2::error("Error finding gpio: '{NAME}'", "NAME", name);
         }
         else
         {
@@ -43,7 +43,7 @@
             }
             catch (const std::system_error&)
             {
-                std::cerr << "Error requesting gpio: " << name << "\n";
+                lg2::error("Error requesting gpio: '{NAME}'", "NAME", name);
             }
         }
     }
@@ -58,7 +58,7 @@
             }
             catch (const std::system_error& exc)
             {
-                std::cerr << "Error set_value: " << exc.what() << "\n";
+                lg2::error("Error set_value: '{EC}'", "EC", exc);
             }
         }
     }