types/wlr_input_device: move init and finish function to private API

include/wlr/backend/headless.h

@@ -10,7 +10,6 @@
 #define WLR_BACKEND_HEADLESS_H
 
 #include <wlr/backend.h>
-#include <wlr/types/wlr_input_device.h>
 #include <wlr/types/wlr_output.h>
 
 /**

include/wlr/backend/libinput.h

@@ -13,7 +13,8 @@
 #include <wayland-server-core.h>
 #include <wlr/backend.h>
 #include <wlr/backend/session.h>
-#include <wlr/types/wlr_input_device.h>
+
+struct wlr_input_device;
 
 struct wlr_backend *wlr_libinput_backend_create(struct wl_display *display,
 		struct wlr_session *session);

include/wlr/backend/wayland.h

@@ -4,9 +4,10 @@
 #include <wayland-client.h>
 #include <wayland-server-core.h>
 #include <wlr/backend.h>
-#include <wlr/types/wlr_input_device.h>
 #include <wlr/types/wlr_output.h>
 
+struct wlr_input_device;
+
 /**
  * Creates a new wlr_wl_backend. This backend will be created with no outputs;
  * you must use wlr_wl_output_create to add them.

include/wlr/backend/x11.h

@@ -6,9 +6,10 @@
 #include <wayland-server-core.h>
 
 #include <wlr/backend.h>
-#include <wlr/types/wlr_input_device.h>
 #include <wlr/types/wlr_output.h>
 
+struct wlr_input_device;
+
 /**
  * Creates a new wlr_x11_backend. This backend will be created with no outputs;
  * you must use wlr_x11_output_create to add them.