dinput: Rename set_dinput_hook and call it from the base class.

Since keyboard's acquire and unacquire don't do anything special just call
the base class.
diff --git a/dlls/dinput/dinput_private.h b/dlls/dinput/dinput_private.h
index 4bce692..a371263 100644
--- a/dlls/dinput/dinput_private.h
+++ b/dlls/dinput/dinput_private.h
@@ -57,7 +57,7 @@
 
 extern HINSTANCE DINPUT_instance;
 
-extern HHOOK set_dinput_hook(int hook_id, LPVOID proc);
+extern void check_dinput_hooks(LPDIRECTINPUTDEVICE8A);
 typedef void (*DI_EVENT_PROC)(LPDIRECTINPUTDEVICE8A, WPARAM, LPARAM);
 
 #endif /* __WINE_DLLS_DINPUT_DINPUT_PRIVATE_H */