proc: Move PDE_NET() to fs/proc/proc_net.c

Move PDE_NET() to fs/proc/proc_net.c as that's where the only user is.

Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

fs/proc/proc_net.c

@@ -26,6 +26,10 @@
 
 #include "internal.h"
 
+static inline struct net *PDE_NET(struct proc_dir_entry *pde)
+{
+	return pde->parent->data;
+}
 
 static struct net *get_proc_net(const struct inode *inode)
 {