floppy: format block0 read error message properly

In case reading of block 0 fails, line without trailing newline
is printed causing dmesg to look horrible.

Signed-off-by: Jiri Kosina <jkosina@suse.cz>
diff --git a/drivers/block/floppy.c b/drivers/block/floppy.c
index 8e767bb..f0c95df 100644
--- a/drivers/block/floppy.c
+++ b/drivers/block/floppy.c
@@ -3774,7 +3774,7 @@
 	int drive = cbdata->drive;
 
 	if (err) {
-		pr_info("floppy: error %d while reading block 0", err);
+		pr_info("floppy: error %d while reading block 0\n", err);
 		set_bit(FD_OPEN_SHOULD_FAIL_BIT, &UDRS->flags);
 	}
 	complete(&cbdata->complete);