move unlink_recursive declaration to libfile.h

unlink_recursive is a file utility function, so move the prototype to
libfile.h

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

commands/loadenv.c

@@ -26,6 +26,7 @@
 #include <envfs.h>
 #include <errno.h>
 #include <fs.h>
+#include <libfile.h>
 #include <malloc.h>
 #include <globalvar.h>
 

commands/rm.c

@@ -19,6 +19,7 @@
 #include <common.h>
 #include <command.h>
 #include <fs.h>
+#include <libfile.h>
 #include <getopt.h>
 #include <errno.h>
 

include/fs.h

@@ -179,8 +179,6 @@ void automount_remove(const char *_path);
 int automount_add(const char *path, const char *cmd);
 void automount_print(void);
 
-int unlink_recursive(const char *path, char **failedpath);
-
 int fsdev_open_cdev(struct fs_device_d *fsdev);
 const char *cdev_get_mount_path(struct cdev *cdev);
 const char *cdev_mount_default(struct cdev *cdev, const char *fsoptions);

include/libfile.h

@@ -24,4 +24,6 @@ int open_and_lseek(const char *filename, int mode, loff_t pos);
 /* Create a directory and its parents */
 int make_directory(const char *pathname);
 
+int unlink_recursive(const char *path, char **failedpath);
+
 #endif /* __LIBFILE_H */

lib/unlink-recursive.c

@@ -1,4 +1,5 @@
 #include <common.h>
+#include <libfile.h>
 #include <errno.h>
 #include <libbb.h>
 #include <fs.h>