Restore obsolete constants as they are still used in some code I don’t want to touch

include/EDriverTypes.h

@@ -20,6 +20,13 @@ namespace video
 		render and display any graphics. */
 		EDT_NULL,
 
+		// obsolete constants to make some code happy
+		// TODO delete
+		EDT_SOFTWARE,
+		EDT_BURNINGSVIDEO,
+		DEPRECATED_EDT_DIRECT3D8_NO_LONGER_EXISTS,
+		EDT_DIRECT3D9,
+
 		//! OpenGL device, available on most platforms.
 		/** Performs hardware accelerated rendering of 3D and 2D
 		primitives. */