entity-manager: move logDeviceAdded/Removed

functions do not need to be 'inline' and since they are normal
functions, they can go into a .cpp file to be compiled separately.

Functions otherwise unchanged.

Tested: Inspection only.

References:
[1] https://en.cppreference.com/w/cpp/language/inline.html

Change-Id: I194d86f17f90d54d6be2286a52482457435f4c36
Signed-off-by: Alexander Hansen <alexander.hansen@9elements.com>
diff --git a/src/entity_manager/entity_manager.cpp b/src/entity_manager/entity_manager.cpp
index b191bf0..83240be 100644
--- a/src/entity_manager/entity_manager.cpp
+++ b/src/entity_manager/entity_manager.cpp
@@ -21,6 +21,7 @@
 #include "../variant_visitors.hpp"
 #include "configuration.hpp"
 #include "dbus_interface.hpp"
+#include "log_device_inventory.hpp"
 #include "overlay.hpp"
 #include "perform_scan.hpp"
 #include "phosphor-logging/lg2.hpp"