udev: move definition of READ_END and WRITE_END from libudev-private.h to udev.h

src/libudev/libudev-private.h

@@ -13,9 +13,6 @@
 #include "strxcpyx.h"
 #include "util.h"
 
-#define READ_END  0
-#define WRITE_END 1
-
 /* libudev-device.c */
 struct udev_device *udev_device_new_from_nulstr(struct udev *udev, char *nulstr, ssize_t buflen);
 struct udev_device *udev_device_new_from_synthetic_event(struct udev *udev, const char *syspath, const char *action);

src/udev/udev.h

@@ -17,8 +17,11 @@
 #include "libudev-private.h"
 #include "macro.h"
 #include "strv.h"
-#include "util.h"
 #include "udev-util.h"
+#include "util.h"
+
+#define READ_END  0
+#define WRITE_END 1
 
 struct udev_event {
         sd_device *dev;