dgrp procfs fixes, part 1

proc_create() has shat upon fops argument when mode is S_IFDIR.
Good thing, too, since fops passed to it is completely useless
for any directory.  Just use proc_mkdir(), damnit.
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>

drivers/staging/dgrp/dgrp_specproc.c

@@ -201,8 +201,7 @@ void dgrp_register_proc(void)
 	/*
 	 *	Register /proc/dgrp
 	 */
-	dgrp_proc_dir_entry = proc_create("dgrp", S_IFDIR, NULL,
-					  &dgrp_proc_file_ops);
+	dgrp_proc_dir_entry = proc_mkdir("dgrp", NULL);
 	register_proc_table(dgrp_table, dgrp_proc_dir_entry);
 }