tools: usbip: list.h: fix kernel-doc for list_del()

In list.h, the kernel-doc for list_del() should be immediately
preceding the implementation and not separated from it by
another function implementation.

Eliminates this kernel-doc error:
list.h:1: warning: 'list_del' not found

Cc: Greg Kroah-Hartman <[e-mail]>
Cc: Valentina Manea <[e-mail]>
Cc: Shuah Khan <[e-mail]>
Cc: Shuah Khan <[e-mail]>
Cc: [e-mail]
Acked-by: Shuah Khan <[e-mail]>
Signed-off-by: Randy Dunlap <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

tools/usb/usbip/libsrc/list.h

···
 #define LIST_POISON1  ((void *) 0x00100100 + POISON_POINTER_DELTA)
 #define LIST_POISON2  ((void *) 0x00200200 + POISON_POINTER_DELTA)
 
+static inline void __list_del_entry(struct list_head *entry)
+{
+	__list_del(entry->prev, entry->next);
+}
+
 /**
  * list_del - deletes entry from list.
  * @entry: the element to delete from the list.
  * Note: list_empty() on entry does not return true after this, the entry is
  * in an undefined state.
  */
-static inline void __list_del_entry(struct list_head *entry)
-{
-	__list_del(entry->prev, entry->next);
-}
-
 static inline void list_del(struct list_head *entry)
 {
 	__list_del(entry->prev, entry->next);