NetFn: Use api.hpp instead of api.h

Since NetFn declared in api.h has been gradually deprecated, this
submission is to use api.hpp instead of api.h

Change-Id: I7631e68bd62d15dfc7274058b2ece38e3421a661
Signed-off-by: George Liu <liuxiwei@ieisystem.com>
diff --git a/sensorhandler.cpp b/sensorhandler.cpp
index 134eaa6..e48d0ea 100644
--- a/sensorhandler.cpp
+++ b/sensorhandler.cpp
@@ -1568,16 +1568,18 @@
                           ipmi::Privilege::User, ipmiSenSetSensorThresholds);
 
     // <Get Device SDR>
-    ipmi_register_callback(NETFUN_SENSOR, ipmi::sensor_event::cmdGetDeviceSdr,
-                           nullptr, ipmi_sen_get_sdr, PRIVILEGE_USER);
+    ipmi_register_callback(ipmi::netFnSensor,
+                           ipmi::sensor_event::cmdGetDeviceSdr, nullptr,
+                           ipmi_sen_get_sdr, PRIVILEGE_USER);
 
 #endif
 
     // Common Handers used by both implementation.
 
     // <Platform Event Message>
-    ipmi_register_callback(NETFUN_SENSOR, ipmi::sensor_event::cmdPlatformEvent,
-                           nullptr, ipmicmdPlatformEvent, PRIVILEGE_OPERATOR);
+    ipmi_register_callback(ipmi::netFnSensor,
+                           ipmi::sensor_event::cmdPlatformEvent, nullptr,
+                           ipmicmdPlatformEvent, PRIVILEGE_OPERATOR);
 
     // <Get Sensor Type>
     ipmi::registerHandler(ipmi::prioOpenBmcBase, ipmi::netFnSensor,