scsi: print single-character strings with seq_putc

Using seq_putc to print a single character saves at least a strlen()
call and a memory access, and may also give a small .text reduction.

Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Reviewed-by: Finn Thain <fthain@telegraphics.com.au>
Signed-off-by: Christoph Hellwig <hch@lst.de>

drivers/scsi/atari_NCR5380.c

@@ -716,7 +716,7 @@ static void show_Scsi_Cmnd(struct scsi_cmnd *cmd, struct seq_file *m)
 	seq_printf(m, "%2d (0x%02x)", command[0], command[0]);
 	for (i = 1, s = COMMAND_SIZE(command[0]); i < s; ++i)
 		seq_printf(m, " %02x", command[i]);
-	seq_puts(m, "\n");
+	seq_putc(m, '\n');
 }
 
 static int __maybe_unused NCR5380_show_info(struct seq_file *m,