staging: exfat: Replace printk with pr_info

pr_info is preferred to use than printk.
pr_info calls printk with KERN_INFO macros by itself.
Signed-off-by: JieunKim <jieun.kim4758@gmail.com>
Link: https://lore.kernel.org/r/20200210091421.12335-1-jieun.kim4758@gmail.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/exfat/exfat_super.c

@@ -364,7 +364,7 @@ static int ffsMountVol(struct super_block *sb)
 	exfat_bdev_open(sb);
 
 	if (p_bd->sector_size < sb->s_blocksize) {
-		printk(KERN_INFO "EXFAT: mount failed - sector size %d less than blocksize %ld\n",
+		pr_info("EXFAT: mount failed - sector size %d less than blocksize %ld\n",
 		       p_bd->sector_size,  sb->s_blocksize);
 		ret = -EINVAL;
 		goto out;