dgrp procfs fixes, part 2

All table entries either have non-NULL ->proc_file_fops or
non-NULL child.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

drivers/staging/dgrp/dgrp_specproc.c

@@ -269,10 +269,7 @@ static void register_proc_table(struct dgrp_proc_entry *table,
 			de->data = (void *) table;
 			if (!table->child) {
 				de->proc_iops = &proc_inode_ops;
-				if (table->proc_file_ops)
-					de->proc_fops = table->proc_file_ops;
-				else
-					de->proc_fops = &dgrp_proc_file_ops;
+				de->proc_fops = table->proc_file_ops;
 			}
 		}
 		table->de = de;