jbd2: use str_plural() to fix Coccinelle warning

Fixes the following Coccinelle/coccicheck warning reported by
string_choices.cocci:

	opportunity for str_plural(dropped)
Signed-off-by: Thorsten Blum <thorsten.blum@toblux.com>
Link: https://patch.msgid.link/20240402105157.254389-2-thorsten.blum@toblux.comSigned-off-by: Theodore Ts'o <tytso@mit.edu>

fs/jbd2/recovery.c

@@ -19,6 +19,7 @@
 #include <linux/errno.h>
 #include <linux/crc32.h>
 #include <linux/blkdev.h>
+#include <linux/string_choices.h>
 #endif
 
 /*
@@ -374,7 +375,7 @@ int jbd2_journal_skip_recovery(journal_t *journal)
 			be32_to_cpu(journal->j_superblock->s_sequence);
 		jbd2_debug(1,
 			  "JBD2: ignoring %d transaction%s from the journal.\n",
-			  dropped, (dropped == 1) ? "" : "s");
+			  dropped, str_plural(dropped));
 #endif
 		journal->j_transaction_sequence = ++info.end_transaction;
 		journal->j_head = info.head_block;