quota: simplify two-level sysctl registration for fs_dqstats_table

There is no need to declare two tables to just create directories,
this can be easily be done with a prefix path with register_sysctl().

Simplify this registration.
Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>
Signed-off-by: Jan Kara <jack@suse.cz>
Message-Id: <20230310231206.3952808-4-mcgrof@kernel.org>

fs/quota/dquot.c

@@ -2948,24 +2948,6 @@ static struct ctl_table fs_dqstats_table[] = {
 	{ },
 };
 
-static struct ctl_table fs_table[] = {
-	{
-		.procname	= "quota",
-		.mode		= 0555,
-		.child		= fs_dqstats_table,
-	},
-	{ },
-};
-
-static struct ctl_table sys_table[] = {
-	{
-		.procname	= "fs",
-		.mode		= 0555,
-		.child		= fs_table,
-	},
-	{ },
-};
-
 static int __init dquot_init(void)
 {
 	int i, ret;
@@ -2973,7 +2955,7 @@ static int __init dquot_init(void)
 
 	printk(KERN_NOTICE "VFS: Disk quotas %s\n", __DQUOT_VERSION__);
 
-	register_sysctl_table(sys_table);
+	register_sysctl("fs/quota", fs_dqstats_table);
 
 	dquot_cachep = kmem_cache_create("dquot",
 			sizeof(struct dquot), sizeof(unsigned long) * 4,