SUNRPC: Remove an unneeded implicit type cast when calling rpc_depopulate()

The two arguments of rpc_depopulate() that pass in inode numbers should use
the same type as inode->i_ino: unsigned long.
Signed-off-by: NChuck Lever <chuck.lever@oracle.com>
Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>

net/sunrpc/rpc_pipe.c

@@ -523,8 +523,8 @@ rpc_get_inode(struct super_block *sb, int mode)
 /*
  * FIXME: This probably has races.
  */
-static void
-rpc_depopulate(struct dentry *parent, int start, int eof)
+static void rpc_depopulate(struct dentry *parent,
+			   unsigned long start, unsigned long eof)
 {
 	struct inode *dir = parent->d_inode;
 	struct list_head *pos, *next;