md/raid0: use str_plural helper in dump_zones

Replace the manual ternary "s" pluralization with str_plural() to
simplify the code.

Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev>
Link: https://patch.msgid.link/20260527141932.1243503-2-thorsten.blum@linux.dev
Signed-off-by: Yu Kuai <yukuai@fygo.io>

Author: toblux

drivers/md/raid0.c

@@ -14,6 +14,7 @@
 #include <linux/seq_file.h>
 #include <linux/module.h>
 #include <linux/slab.h>
+#include <linux/string_choices.h>
 #include <trace/events/block.h>
 #include "md.h"
 #include "raid0.h"
@@ -43,7 +44,7 @@ static void dump_zones(struct mddev *mddev)
 	int raid_disks = conf->strip_zone[0].nb_dev;
 	pr_debug("md: RAID0 configuration for %s - %d zone%s\n",
 		 mdname(mddev),
-		 conf->nr_strip_zones, conf->nr_strip_zones==1?"":"s");
+		 conf->nr_strip_zones, str_plural(conf->nr_strip_zones));
 	for (j = 0; j < conf->nr_strip_zones; j++) {
 		char line[200];
 		int len = 0;