ext4: use str_plural() instead of custom macro

Remove the custom PLURAL() macro and use str_plural() from
string_choices.h instead.

Reviewed-by: Baokun Li <libaokun@huawei.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Joshua Crofts <joshua.crofts1@gmail.com>
Link: https://patch.msgid.link/20260713-remove-plural-macro-v2-1-424e1536ac10@gmail.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>

fs/ext4/orphan.c

@@ -4,6 +4,7 @@
 #include <linux/fs.h>
 #include <linux/quotaops.h>
 #include <linux/buffer_head.h>
+#include <linux/string_choices.h>
 
 #include "ext4.h"
 #include "ext4_jbd2.h"
@@ -486,14 +487,12 @@ void ext4_orphan_cleanup(struct super_block *sb, struct ext4_super_block *es)
 		}
 	}
 
-#define PLURAL(x) (x), ((x) == 1) ? "" : "s"
-
 	if (nr_orphans)
 		ext4_msg(sb, KERN_INFO, "%d orphan inode%s deleted",
-		       PLURAL(nr_orphans));
+			 nr_orphans, str_plural(nr_orphans));
 	if (nr_truncates)
 		ext4_msg(sb, KERN_INFO, "%d truncate%s cleaned up",
-		       PLURAL(nr_truncates));
+			 nr_truncates, str_plural(nr_truncates));
 #ifdef CONFIG_QUOTA
 	/* Turn off quotas if they were enabled for orphan cleanup */
 	if (quota_update) {